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MARINE RADAR
MODEL 1835
MODEL 1935
MODEL 1945
OPERATOR'S MANUAL
www.furuno.co.jp
MODEL
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i
IMPORTANT NOTICES
General
The operator of this equipment must read and follow the descriptions in this manual. Wrong op-
eration or maintenance can cancel the warranty or cause injury.
Do not copy any part of this manual without written permission from FURUNO.
If this manual is lost or worn, contact your dealer about replacement.
The contents of this manual and equipment specifications can change without notice.
The example screens (or illustrations) shown in this manual can be different from the screens
you see on your display. The screens you see depend on your system configuration and equip-
ment settings.
Save this manual for future reference.
Any modification of the equipment (including software) by persons not authorized by FURUNO
will cancel the warranty.
All brand and product names are trademarks, registered trademarks or service marks of their
respective holders.
How to discard this product
Discard this product according to local regulations for the disposal of industrial waste. For disposal
in the USA, see the homepage of the Electronics Industries Alliance (http://www.eiae.org/) for the
correct method of disposal.
How to discard a used battery
Some FURUNO products have a battery(ies). To see if your product has a battery(ies), see the
chapter on Maintenance. Follow the instructions below if a battery(ies) is used.
In the European Union
The crossed-out trash can symbol indicates that all types of batteries
must not be discarded in standard trash, or at a trash site. Take the
used batteries to a battery collection site according to your national
legislation and the Batteries Directive 2006/66/EU.
In the USA
The Mobius loop symbol (three chasing arrows) indicates that Ni-Cd
and lead-acid rechargeable batteries must be recycled. Take the used
batteries to a battery collection site according to local laws.
In the other countries
There are no international standards for the battery recycle symbol. The number of symbols can
increase when the other countries make their own recycle symbols in the future.
Cd
Ni-Cd Pb
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ii
SAFETY INSTRUCTIONS
WARNING
Radio Frequency Radiation Hazard
The radar antenna sends the electromagnetic radio frequency (RF) energy. This energy
can be dangerous to you, especially your eyes. Do not look at the radiator or near the
antenna when the antenna is rotating.
The distances at which RF radiation levels of 100 W/m
2
and 10 W/m
2
exist are shown in
the table.
Note: If the antenna unit is installed at a close distance in front of the wheel house,
prevent the transmission in that area to protect passengers and crew from microwave
radiation. Set the [Sector Blanks] in the [System] menu.
Model
Distance to
100 W/m
2
point
WARNING
Indicates a condition that can cause death or serious
injury if not avoided.
CAUTION
Indicates a condition that can cause minor or moderate
injury if not avoided.
Warning, Caution
Mandatory Action
Prohibitive Action
Read these safety instructions before you operate the equipment.
Distance to
10 W/m
2
point
1835
1935
1945
Worst case 0.2 m
Worst case 2.2 m
Worst case 2.2 m
Worst case 2.4 m
Worst case 0.1 m
Worst case 0.2 m
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SAFETY INSTRUCTIONS
iii
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified persons can work
inside the equipment.
Turn off the power before you
service the antenna unit. Post a
warning sign near the power
switch not to turn on the power
while you service the antenna
unit.
Prevent the potential risk of being
struck by the rotating antenna and
exposure to RF radiation hazard.
When you work on the antenna
unit, wear a safety belt and hard
hat.
Serious injury or death can result
if a person falls from the radar
antenna mast.
Do not disassemble or modify
the equipment.
Fire or electrical shock can occur.
Turn off the power immediately
if water leaks into the equipment
or smoke or fire is coming
from the equipment.
Failure to turn off the equipment
can cause fire or electrical shock.
Use the correct fuse.
A wrong fuse can damage the
equipment and cause fire.
Keep heater away from the
equipment.
Heat can change the equipment
shape and melt the power cord, which
can cause fire or electrical shock.
Do not put liquid-filled containers
on the top of the equipment.
Fire or electrical shock can occur if a
liquid spills into the equipment.
Do not operate the equipment with
wet hands.
Electrical shock can occur.
WARNING
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SAFETY INSTRUCTIONS
iv
Do not depend on one navigation
device for the navigation of the
ship. The navigator must check all
aids available to confirm position.
Electronic aids are not a
replacement for basic navigation
principles and common sense.
· The ARPA automatically tracks an
automatically or manually acquired
radar target and calculates its
course and speed, indicating them
by a vector. Since the data from the
auto plotter depend on the selected
radar targets, the radar must be
optimally tuned for use with the auto
plotter, to ensure required targets
will not be lost or unnecessary
targets like sea returns and noise
will not be acquired and tracked.
· A target is not always a landmass,
reef, ship, but can also be returns
from the sea surface and from
clutter. As the level of clutter
changes with the environment, the
operator must correctly adjust the
A/C SEA, A/C RAIN and GAIN
controls so that the target echoes do
not disappear from the radar screen.
CAUTION
CAUTION
The plotting accuracy and response of
this ARPA meets IMO standards.
The tracking accuracy is affected by the
following:
· The tracking accuracy is affected by
course change. One to two minutes is
required to restore vectors to full
accuracy after a sudden course change.
(The actual amount depends on
gyrocompass specifications.)
· The amount of tracking delay is inversely
proportional to the relative speed of the
target. Delay is on the order of 15-30
seconds for high relative speed; 30-60
seconds for low relative speed.
The data from ARPA and AIS are
intended for reference purposes only.
Check all available navigation aids to
determine target movement.
WARNING
To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.
WARNING LABELS
Warning labels are attached to the equipment.
Do not remove any label. If a label is missing or
damaged, contact a FURUNO agent or dealer
about replacement.
WARNING
Radiation hazard. Only qualified
personnel should work inside scanner.
Confirm that TX has stopped before
opening scanner.
DISPLAY UNIT
ANTENNA UNIT
TFT LCD
The high quality TFT (Thin Film
Transistor) LCD displays 99.999%
of its picture elements.
The remaining 0.001% may drop
out or light, however this is an
inherent property of the LCD; it is
not a sign of malfunction.
WARNING
Name: Warning Label 1
Type:
86-003-1011-3
Code No.: 100-236-233-10
Name: Warning Sticker
Type:
03-142-3201-0
Code No.: 100-266-890-10
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v
TABLE OF CONTENTS
FOREWORD...................................................................................................................ix
SYSTEM CONFIGURATION.........................................................................................xii
1. DESCRIPTION OF OPERATION ..........................................................................1-1
1.1 Controls ......................................................................................................................1-1
1.2 How to Turn the Radar On/Off and Transmit..............................................................1-2
1.3 Display Indications......................................................................................................1-3
1.4 How to Adjust Display Brilliance, Panel Dimmer ........................................................1-4
1.5 Menu Description........................................................................................................1-4
1.6 Tuning.........................................................................................................................1-6
1.7 Display Modes............................................................................................................1-7
1.7.1 How to select the display mode......................................................................1-7
1.7.2 Description of display modes .........................................................................1-8
1.8 How to Select a Range Scale...................................................................................1-10
1.9 How to Adjust the Gain (sensitivity)..........................................................................1-10
1.10 How to Reduce the Sea Clutter................................................................................1-11
1.11 How to Reduce the Rain Clutter...............................................................................1-12
1.12 Automatic Adjustments of Sea and Rain Clutters ....................................................1-13
1.13 Cursor.......................................................................................................................1-14
1.14 Interference Rejector................................................................................................1-15
1.15 How to Measure the Range to a Target ...................................................................1-16
1.15.1 How to adjust range ring brilliance ...............................................................1-16
1.15.2 How to measure the range with a VRM........................................................1-17
1.15.3 How to select VRM unit ................................................................................1-17
1.16 How to Measure the Bearing to a Target..................................................................1-18
1.16.1 How to measure the bearing with an EBL ....................................................1-18
1.16.2 EBL reference ..............................................................................................1-19
1.17 How to Measure the Range and Bearing Between Two Targets .............................1-19
1.18 How to Select a Pulselength.....................................................................................1-20
1.19 Target Alarm.............................................................................................................1-21
1.19.1 How to set a target alarm zone ....................................................................1-22
1.19.2 How to stop the audio alarm.........................................................................1-22
1.19.3 How to select the alarm type ........................................................................1-23
1.19.4 How to sleep a target alarm temporarily.......................................................1-23
1.19.5 How to deactivate a target alarm..................................................................1-24
1.19.6 How to select the target strength which triggers a target alarm ...................1-24
1.19.7 How to turn the buzzer on/off .......................................................................1-24
1.20 How to Off-center the Display...................................................................................1-25
1.20.1 How to select the off-center mode................................................................1-25
1.20.2 Off-center the display ...................................................................................1-25
1.21 Zoom ........................................................................................................................1-27
1.21.1 Zoom mode ..................................................................................................1-27
1.21.2 How to zoom ................................................................................................1-27
1.22 Echo Stretch.............................................................................................................1-29
1.23 Echo Average...........................................................................................................1-29
1.24 Target Trails .............................................................................................................1-30
1.24.1 Trail time.......................................................................................................1-30
1.24.2 How to start, stop the trails...........................................................................1-31
1.24.3 Trail mode ....................................................................................................1-31
1.24.4 Trail gradation ..............................................................................................1-32
1.24.5 Trail color......................................................................................................1-32
1.24.6 Trail level......................................................................................................1-33
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TABLE OF CONTENTS
vi
1.24.7 How to restart, stop the trails .......................................................................1-33
1.24.8 Narrow trails.................................................................................................1-34
1.24.9 Your ship trail ...............................................................................................1-34
1.25 How to Send the Target Position .............................................................................1-34
1.26 How to Hide the Heading Line Temporarily .............................................................1-35
1.27 Presentation Brilliance .............................................................................................1-35
1.28 Custom Setup ..........................................................................................................1-35
1.28.1 About custom setup .....................................................................................1-35
1.28.2 Description of custom setup items ...............................................................1-36
1.28.3 How to set custom setups............................................................................1-37
1.29 How to Program Function Keys (F1, F2 and F3 keys).............................................1-37
1.30 Noise Rejector..........................................................................................................1-38
1.31 Wiper........................................................................................................................1-39
1.32 How to Reduce Second-trace Echoes .....................................................................1-39
1.33 Watchman................................................................................................................1-40
1.34 Color Selections.......................................................................................................1-41
1.34.1 Preset colors ................................................................................................1-41
1.34.2 Custom colors ..............................................................................................1-41
1.35 Navigation Data........................................................................................................1-43
1.35.1 Navigation data during standby....................................................................1-43
1.35.2 Navigation data at the bottom of the screen ................................................1-43
1.36 Dynamic Range........................................................................................................1-44
1.37 Characteristics Curve...............................................................................................1-45
1.38 Waypoint Marker......................................................................................................1-46
1.39 Alarm Message ........................................................................................................1-46
1.40 Echo Area ................................................................................................................1-48
1.41 Initial Sub Menu .......................................................................................................1-49
1.41.1 How to open the Initial sub menu.................................................................1-49
1.41.2 Description of Initial sub menu.....................................................................1-49
1.42 Units Sub Menu........................................................................................................1-51
1.43 Sector Blank.............................................................................................................1-52
1.44 Other Menu Items ....................................................................................................1-53
1.44.1 Menu items on the [Brill/Color] menu...........................................................1-53
1.44.2 Menu items on the [Display] menu...............................................................1-55
1.44.3 Menu items on the [Echo] menu ..................................................................1-56
1.45 Remote Display........................................................................................................1-56
2. DESCRIPTION OF RADAR...................................................................................2-1
2.1 General ......................................................................................................................2-1
2.1.1 Minimum and maximum ranges.....................................................................2-1
2.1.2 Radar resolution.............................................................................................2-2
2.1.3 Bearing accuracy ...........................................................................................2-3
2.1.4 Range measurement......................................................................................2-3
2.2 False Echoes .............................................................................................................2-3
2.2.1 Multiple echoes ..............................................................................................2-3
2.2.2 Sidelobe echoes.............................................................................................2-4
2.2.3 Virtual image .................................................................................................. 2-4
2.2.4 Shadow sector ...............................................................................................2-5
2.3 SART (Search and Rescue Transponder) .................................................................2-6
2.3.1 SART description ........................................................................................... 2-6
2.3.2 General remarks on receiving SART .............................................................2-7
2.4 RACON ......................................................................................................................2-8
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TABLE OF CONTENTS
vii
3. ARPA OPERATION...............................................................................................3-1
3.1 Precautions for Use....................................................................................................3-1
3.2 Controls for Use with ARPA .......................................................................................3-1
3.3 ARPA Display On/Off .................................................................................................3-2
3.4 How to Acquire and Track the Targets.......................................................................3-2
3.4.1 Manual acquisition..........................................................................................3-2
3.4.2 Automatic acquisition .....................................................................................3-3
3.5 How to Stop the Tracking of ARPA Target.................................................................3-3
3.5.1 How to stop the tracking of selected targets ..................................................3-3
3.5.2 How to stop the tracking of all targets ............................................................3-3
3.6 Vector Attributes.........................................................................................................3-4
3.6.1 What is a vector?............................................................................................3-4
3.6.2 Vector time and vector reference ...................................................................3-4
3.6.3 Vector of your ship .........................................................................................3-5
3.7 History Display (target past position)..........................................................................3-6
3.8 ARPA Target Data......................................................................................................3-7
3.9 CPA/TCPA Alarm .......................................................................................................3-8
3.10 Proximity Alarm ..........................................................................................................3-9
3.11 Lost Target ...............................................................................................................3-10
3.12 Symbol Color............................................................................................................3-10
4. AIS OPERATION...................................................................................................4-1
4.1 Controls for Use with AIS ...........................................................................................4-1
4.2 AIS Display On/Off .....................................................................................................4-1
4.3 AIS Symbols...............................................................................................................4-2
4.4 Activating, Sleeping Targets.......................................................................................4-2
4.5 AIS Target Data..........................................................................................................4-3
4.6 How to Sort Targets....................................................................................................4-4
4.7 Display Range ............................................................................................................4-4
4.8 How to Display the Targets within a Specific Sector ..................................................4-5
4.9 Number of Targets to Display.....................................................................................4-5
4.10 Vector Attributes.........................................................................................................4-6
4.10.1 What is a vector?............................................................................................4-6
4.10.2 Vector time and vector reference ...................................................................4-6
4.11 History Display (target past position)..........................................................................4-7
4.12 CPA/TCPA Alarm .......................................................................................................4-8
4.13 Proximity Alarm ..........................................................................................................4-9
4.14 Lost Target .................................................................................................................4-9
4.15 Symbol Color............................................................................................................4-10
4.16 How to Ignore Slow Targets .....................................................................................4-10
5. GPS OPERATION .................................................................................................5-1
5.1 Navigator Mode ..........................................................................................................5-1
5.2 Datum.........................................................................................................................5-1
5.3 WAAS Setup...............................................................................................................5-2
5.4 Satellite Monitor..........................................................................................................5-3
5.5 Cold Start....................................................................................................................5-4
6. MAINTENANCE, TROUBLESHOOTING ..............................................................6-1
6.1 Preventive Maintenance.............................................................................................6-2
6.2 Fuse Replacement .....................................................................................................6-3
6.3 Magnetron Life............................................................................................................6-3
6.4 LCD Backlight Life......................................................................................................6-3
6.5 Simple Troubleshooting..............................................................................................6-4
6.6 Advanced-level Troubleshooting................................................................................6-5
6.7 Diagnostic Test...........................................................................................................6-7
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TABLE OF CONTENTS
viii
6.8 LCD Test .................................................................................................................... 6-9
6.9 ARPA Test ............................................................................................................... 6-10
6.10 GPS Test.................................................................................................................. 6-11
APPENDIX 1 MENU TREE .......................................................................................AP-1
APPENDIX 2 GEODETIC CHART LIST ...................................................................AP-5
SPECIFICATIONS .....................................................................................................SP-1
INDEX..........................................................................................................................IN-1
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ix
FOREWORD
A Word to the Owner of the MODEL 1835/1935/1945 Marine Radar
Congratulations on your choice of the FURUNO MODEL 1835/1935/1945 Marine Radar. We are
confident you will see why the FURUNO name has become synonymous with quality and reliabil-
ity.
For over 60 years FURUNO Electric Company has enjoyed an enviable reputation for innovative
and dependable marine electronics equipment. This dedication to excellence is furthered by our
extensive global network of agents and dealers.
Your equipment is designed and constructed to meet the rigorous demands of the marine envi-
ronment. However, no machine can perform its intended function unless properly installed and
maintained. Please carefully read and follow the operation and maintenance procedures set forth
in this manual.
We would appreciate feedback from you, the end-user, about whether we are achieving our pur-
poses.
Thank you for considering and purchasing FURUNO equipment.
Features
The MODEL 1835/1935/1945 (the MODEL 1835 series herein after) display ships, lands, etc. on
a 10.4-inch color LCD. You can operate this equipment with the keys, knob controls and Cursor-
pad.
The main features are as shown below.
The MODEL 1835 series has the following models:
Bright 10.4-inch LCD is visible in direct sunlight.
An easy to understand user interface with on-screen menu
Fog-Free” color LCD provides clear view in any weather conditions.
Echo area display with full screen provides observation of a wider range around the vessel.
Optional Auto Plotter ARP-11 is available for ARPA operation.
User programmable function keys
AIS data can be displayed with connection of FURUNO AIS Transponder/Receiver.
Echoes in yellow, green, orange or multiple colors
Model
Output
power
Max range
Size and type for
radar antenna
Antenna rotation
MODEL 1835 4 kW 36 nm 60 cm, Radome 24 RPM
MODEL 1935 4 kW 48 nm 100 cm, Open
24/48 RPM
MODEL 1945 6 kW 64 nm 120 cm, Open
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FOREWORD
x
Radar Type and Function Availability
This radar series is available in four types: [River], [Sea], [IEC] and [Russian-River], and function
availability depends on type. The table below shows type and function availability.
[River]: For river, [Sea]: For sea, [IEC]: IEC compliant radar, [Russian-River]: For Russian river
Type and function availability
Item
Type
River Sea IEC Russian-River
Automatic menu
closure
Menu does not close automatically. Menu closes automatically when
there is no menu operation for 10
seconds.
Effective radius
dot count
240 dots 210 dots
Echo color Select the echo display color among
[Yellow], [Green], [Orange] or [Multi].
Select the echo display color among
[Yellow], [Green] or [Orange].
Echo color
customizing
Can customize the echo display
color.
Can not customize the echo display
color.
Echo area Select the display area from [Normal]
or [Full Screen].
Can not select. Display area is circle
only.
Base text display Can show or hide the base text
indications.
Can not hide the base text indica-
tions.
Range preset Select the radar ranges to use. Can not select
the radar ranges
to use.
Unit defaults
1) range
2) speed
1) KM
2) km/h,
m/s
1) NM
2) kn
1) KM
2) km/h,
m/s
Bearing scale Graduation every 1°, 5°, 10°, 30°, no
numeric indication, displayed in the
effective radius
Graduation every 1°, 5°, 10°, 30°,
numeric indication every 30°,
displayed out of the effective radius
VRM unit Can set the VRM unit independently
from the range unit.
Can not set the VRM unit indepen-
dently from the range unit.
Range unit Can change the range unit when
transmitting.
Can not change the range unit in
transmit. Only in standby.
AIS symbol color Select the AIS symbol color from
[Green], [Red], [Blue], [White] or
[Black].
Select the AIS symbol color from
[Green], [Blue], [White] or [Black].
Vector reference Select the display mode for the vector
from [Relative] or [True].
[True]
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FOREWORD
xi
Note on Chinese font: The Chinese font used in this equipment is Ricoh Company Ltd.'s Ricoh
bitmap font.
Item
Type
River Sea IEC Russian-River
Pulselength • 2NM/4KM/2SM: MP
• 4NM/8KM/4SM: LP
• 2NM/4KM/
2SM: SP or
MP
• 4NM/8KM/
4SM: MP or LP
The rule for the
numbering of
ARPA targets
Non-IEC system IEC system
Marks temporary
hidden by press-
ing and holding
the CANCEL/HL
OFF key
Heading line, all marks (EBL, VRM,
target alarm zone, etc.)
Heading line, vector of your ship (with
ARP-11), north marker
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xii
SYSTEM CONFIGURATION
Basic configuration is shown below with solid line.
12 - 24 VDC
Display unit
RDP-152
100/110/220/230 VAC
for MODEL 1835
External buzzer
Echo sounder,
GPS navigator,
AIS, etc.
Remote display
Heading sensor
MODEL 1835
Antenna unit
RSB-0071-057
Echo sounder,
GPS navigator,
AIS, etc.
ECONOMY
RANGE
TLL
GAIN
TRAILS
OFF
CENTER
TARGET
ALARM
STBY
T X
A/C SEA
A/C RAIN
CUSTOM
MENU
CANCEL
EBL VRM
HL OFF
ENTER
R
B
L
L
I
MODEL 1945
Antenna unit
XN12A
RSB-0070/0073-059
MODEL 1935
Antenna unit
XN10A
RSB-0070/0073-064
Rectifier
PR-62
Rectifier
RU-3423
100/110/115/220/230 VAC
for MODEL 1935/1945
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1-1
1. DESCRIPTION OF OPERATION
1.1 Controls
Display unit
The display unit has 16 keys which have labels with their functions, three knob con-
trols and a Cursorpad. When you correctly operate this equipment, the unit beeps one
time. If your operation is wrong, the unit beeps three times.
No. Control Description
1
MENU
Open/close the menu.
2
Cursorpad
Select the menu items and options.
Move the cursor.
3
EBL
Measure the bearing to a target.
4
OFF CENTER
Off-center the display.
5
TLL
Send the latitude and longitude position of
a target to a navigation plotter.
6
GAIN
Rotating: Adjust the sensitivity of the ra-
dar receiver.
7
A/C SEA
Rotating: Reduce the sea clutter.
8
A/C RAIN
Rotating: Reduce the rain clutter.
6,
7, 8
F1, F2, F3
Push: Activate the function given to the
key.
9
CANCEL/
HL OFF
Erase the heading line while you press
this key. Cancel last entry in menu opera-
tion. Cancel the tracking of ARPA target.
Remove data of selected ARPA or AIS
target from the data box. Return one layer
in multiple level menu.
10
ENTER
Save selected menu option. Acquire
ARPA target. Select ARPA or AIS target
to display its data.
11
VRM
Measure the range to a target.
12
TARGET
ALARM
Set the target alarm, which checks for tar-
gets in the operator-set area.
13
RANGE
Select the detection range.
14
CUSTOM
Preset the radar controls for one-touch
operation of radar.
15
TRAILS
Plot the radar echo movement.
16
STBY/TX
Transmit the radar pulses and put the ra-
dar in standby alternately.
17
/BRILL
Short press: Turn on the power. Adjust
the brilliance.
Long press: Turn off the power.
MENU
CANCEL
HL OFF
ENTER
EBL
VRM
OFF
CENTER
TARGET
ALARM
TLL
GAIN
A/C SEA
A/C RAIN
RANGE
+
CUSTOM
TRAILS
STBY
TX
ECONOMY
F1
F2
F3
1
2
3
4
5
B
R
I
L
L
6
7
8
9
11
12
13
14
15
16
17
10
ECONOMY
RANGE
TLL
GAIN
TRAILS
OFF
CENTER
TARGET
ALARM
STBY
T X
A/C SEA
A/C RAIN
CUSTOM
MENU
CANCEL
EBL VRM
HL OFF
ENTER
R
B
L
L
I
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1. DESCRIPTION OF OPERATION
1-2
1.2 How to Turn the Radar On/Off and Transmit
Press the key to turn on the radar. To turn off the radar, press and hold down
the key until the screen turns off.
When you turn on the power, the initialization screen appears followed by the start-up
screen. The start-up screen shows the model name, program number and the results
of the ROM and RAM check, OK or NG (No Good). If NG appears, contact your dealer
for instruction.
Start-up screen
After the self-tests are completed, the bearing scale and a digital timer appear. The
digital timer counts down time necessary to warm the magnetron, which transmits the
radar pulses. The time to warm the magnetron takes 90 sec.
After the timer reads 0:00, the STBY screen appears. The STBY screen has three
types. (See section 1.44.2.) The radar is ready to transmit the radar pulses. Press the
STBY/TX key to transmit the radar pulses.
The STBY/TX key switches between standby and transmit. The antenna rotates in
transmit and is stopped in standby. The magnetron gets old with use. To increase the
life of the magnetron, set the radar in standby when you do not use the radar.
Quick start
If the magnetron is still warm, you can get the radar to TRANSMIT without the warm-
up time. When the key is turned off by accident, turn on the key within 10
seconds after you turn off the power.
B
R
I
L
L
Model name appears here.
0359246-XX.XX
XX: Program version no.
B
R
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L
L
B
R
I
L
L
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1. DESCRIPTION OF OPERATION
1-3
1.3 Display Indications
Display indications
Heading
Nav data: Appears at screen bottom when [Data Box]
in the [Display] menu is set to [Nav] or [All]. Appropriate
sensors required to display nav data.
Cursor data
(Range and bearing or L/L position)
Display mode
Range ring interval
Range
Pulselength
Trail reference
No. 1 EBL bearing
No. 2 EBL bearing
Offcenter
(M: Manual, A: Auto, C: Custom)
North marker
Tuning indicator
Target Alarm 1 (2)
indications
No. 1 VRM range
No. 2 VRM range
WATCHMAN
Target alarm zone 1
Target alarm zone 2
350.0°
TRAIL(T)
15 S
+
1.5
1.5
NM
NM
OFFCENT(A)
WTC
Heading line
Range ring
No. 2 VRM
No. 2 EBL
Zoom window
Zoom cursor
No. 1 EBL
No. 1 VRM
Cursor
Bearing scale
HDG
0.5
SP CS 1
Custom setting
(1 - 3)
H UP
LAT 34°56.123N
LON 135°34.567E
SPEED 12.3KN
LAT 34°56.123N
LON 135°34.567E
TTG 01:00
BR G
14.8°
RNG 0.876NM
TTG
00:20
OWN SHIP
+ CURSOR
WAY POINT
TUNEAUTO
ALM1_ACK
ALM2_OUT
SLAVE
Input source
(shown when display
unit functions as
remote display)
IR 1
A/C AUTO
VRM
0.889
NM
0.422
NM
Interference rejector
Auto adjustment of
rain and sea clutters
22.0
°
R
270.0
°
R
ES 1
EAV 1
EBL
Echo stretch
Echo averaging
241.0
°
R
1.592
NM
VECT
TRUE
05:00
Vector time
ZOOM(R)
Zoom indication
+
Trail time
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1. DESCRIPTION OF OPERATION
1-4
1.4 How to Adjust Display Brilliance, Panel Dimmer
You can adjust the display brilliance and panel dimmer as follows:
1. Press the key momentarily to show the [Brill/Panel] dialog box.
Brill/Panel dialog box
2. Press the ENTER key (or S, T) to select [Brill] or [Panel].
3. Use the Cursorpad (W or X) to adjust. (For brilliance, you can also use the
key.)
4. Press the CANCEL/HL OFF key to close the window.
1.5 Menu Description
This MODEL 1835 series has 15 menus and 6 sub menus. Below is the basic proce-
dure for menu operation.
1. Press the MENU key to open the menu.
Menu
B
R
I
L
L
B
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Cursor*
Menu item
s
and current
settings
Currently selected menu
Scroll bar (Indicates menus currently not shown in menu
window. Black vertical line indicates location in menu.
You can see the menus and sub menus currently not shown
by using or .)
Menu
Title bar*
Guide message
(The simple explanation for
the current menu.)
*: Title bar in currently controllable column is blue; selected cursor is yellow.
Title bar of inactive column is gray.
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1. DESCRIPTION OF OPERATION
1-5
2. Use the Cursorpad (S or T) to select a menu or a sub menu. The cursor (yellow)
in the Menu column indicates the menu currently selected. The menu items in the
right window change according to the menu selected.
Menu description
[Brill/Color]: Adjust the brilliance and color.
[DIsplay]: Set up the display-related features.
[Echo]: Adjust the echo feature.
[Custom 1] - [Custom 3]: Customize the user settings.
[Alarm]: Set up the alarm items.
[Target Trails]: Process trails of the radar targets.
[Tuning]: Adjust the radar tuning.
[Others]: Set up other items.
[Target]: Set up the targets configuration.
[ARPA]: Set up ARPA targets.
[AIS]: Set up AIS targets.
[GPS]: Set up GP-320B (Black-Box GPS).
[System]
[Initial]: Initial settings.
[Tests]: System diagnostic and LCD test.
[Sector Blanks]: Set up the sector blanks to prevent the transmission in a cer-
tain area.
[Units]: Set up units.
[Installation] and [Factory]: For use by the installer. See the Installation Man-
ual.
3. Press the ENTER key to switch the control to the menu items column. The cursor
in the menu column now turns gray and the cursor in the menu items column is
yellow. The control moves to the menu items column.
To switch the control from the menu items column to the menu column, use the
CANCEL/HL OFF key. The color of the title bar of the active column is blue and
of the inactive column is gray.
4. Use the Cursorpad (S or T) to select a menu item and press the ENTER key. A
window with options for the related menu item appears.
Example windows
5. Use the Cursorpad (S or T) to select an option or numeric value.
6. Press the ENTER key to save your selection. To close the window without saving,
press the CANCEL/HL OFF key (instead of the ENTER key).
7. Press the MENU key to close the menu.
Note: The menus on the [IEC] and [Russian-River] types close automatically when
there is no menu operation for 10 seconds, according to IEC regulations. The following
menus and screens are excluded from this regulation:
Alarm message, Alarm status, Tuning Init Adjust, GPS self test, GPS satellite
monitor, System self test, System LCD pattern, and Auto installation setup.
The menus do not close automatically in the [River] or [Sea] configuration.
Display Color options Echo Brill setting windo
w
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1. DESCRIPTION OF OPERATION
1-6
1.6 Tuning
In default, the radar receiver can be tuned automatically after turning the radar to TX.
If you require fine tuning in manual, do the following:
1. Transmit the radar and select the maximum range with the RANGE key.
2. Press the MENU key to open the menu.
3. Use the Cursorpad (S or T) to select [Tuning] and press the ENTER key.
Tuning menu
4. Use the Cursorpad (S or T) to select [Tuning Mode] and press the ENTER key.
Tuning Mode options
5. Use the Cursorpad (S or T) to select [Manual] and press the ENTER key.
6. Use the Cursorpad (S or T) to select [Manual Tuning] and press the ENTER key.
The window shown below appears.
Manual Tuning setting window
7. Use the Cursorpad (S or T) to adjust
the tuning while you look the tuning
bar at the upper-right corner of the dis-
play. The best tuning point is where
the tuning bar moves to maximum value. The vertical bar on the tuning bar shows
the tuning voltage.
8. Press the ENTER key.
9. Press the MENU key to close the menu.
Note: If the automatic tuning does not give the correct tuning, run the [Tuning Init Ad-
just] again.
TUNE MAN
Tuning method (Manual)
Tuning bar
Vertical bar
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1. DESCRIPTION OF OPERATION
1-7
1.7 Display Modes
This radar has the display modes shown below. All modes except head-up require a
heading signal. The true motion mode additionally requires position data.
Relative Motion (RM)
[Head Up] (H UP)
[Course Up] (C UP)
[North Up] (N UP)
[True View] (TRUE VIEW)
True Motion (TM)
[True Motion] (TM)
1.7.1 How to select the display mode
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
Display menu
3. Use the Cursorpad (S or T) to select [Display Mode] and press the ENTER key.
Display Mode options
4. Use the Cursorpad (S or T) to select a display mode and press the ENTER key.
5. Press the MENU key to close the menu.
Note: All modes except head-up require a heading signal in AD-10 format or NMEA
format. If the heading signal is lost, the mode is changed to head-up and the north
marker disappears. The display for heading is XXX.X and the alarm sounds. The mes-
sage "GYRO" (AD-10 format data) or "NMEA_HDG" (NMEA format data) appears in
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1. DESCRIPTION OF OPERATION
1-8
the alarm message display. To stop the audio alarm, press any key. When the heading
signal is restored, check the heading. To check the heading, press the F3 key. The
numeric value is displayed at the heading indication when the heading signal is re-
stored.
1.7.2 Description of display modes
Head-up mode
A display without azimuth stabilization in
which the line that connects the center with
the top of the display indicates your heading.
Targets are shown at their measured dis-
tances and their directions relative to your
heading. The short dotted line on the bearing
scale is the north marker.
Course-up mode
The radar picture is stabilized and displayed
with the currently selected course at the top
of the screen. When you change the head-
ing, the heading line moves with the course
selected. If you select a new course, select
the course-up mode again to display the new
course at the top of the display.
Targets are shown at their measured dis-
tances and their directions relative to the set
course, which is at the 0-degree position.
The heading line moves according to the
yawing and any course change.
North-up mode
Targets are shown at their measured dis-
tances and their true (compass) directions
from your ship. North is at the top of the
screen. The heading line changes its direc-
tion according to your heading.
Heading line
North marker
Heading line
North marker
Heading line
North marker
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1. DESCRIPTION OF OPERATION
1-9
True motion mode
Your ship and other objects in motion move
with their true courses and speed. All fixed tar-
gets, like landmasses, appear as fixed echoes
in ground stabilized TM.
When your ship reaches a point that is 75% of
the radius of the display, the position is reset.
The ship appears at 75% radius opposite to the
extension of the heading line on the display
center. You can manually reset your ship sym-
bol if you press the OFF CENTER key.
Automatic reset of your ship marker in true motion mode
True view mode
The echoes move in real time depending on the change of the heading of your ship.
Heading line is at the top of the screen. When the heading signal is lost, this function
is not available and the display mode automatically changes to the head-up mode.
The [Wiper] is not available in this mode (see section 1.31).
Heading line
North marker
000
010
020
030
040
050
060
070
080
090
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
Heading
line
North
marker
(a) True motion
is selected
(b) Your ship has reached a
point 75% of display radius
(c) Your ship is automatically
reset to 75% of display radius
000
010
020
030
040
050
060
070
080
090
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
000
010
020
030
040
050
060
070
080
090
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
Heading line
North marker
Heading line
North marker
The echoes move
depending on the
change of the heading
of your ship during
one sweep.
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1. DESCRIPTION OF OPERATION
1-10
1.8 How to Select a Range Scale
The selected range scale, range ring interval and pulselength are shown at the upper-
left corner on the screen. When an objective target comes closer, reduce the range
scale so that a target appears in 50-90% of the display radius.
Use the RANGE key to select range. Press the "+" part of the key to raise the range;
the "-" part to lower the range.
1.9 How to Adjust the Gain (sensitivity)
The gain functions to adjust the sensitivity of the receiver for the best reception. The
gain can be adjusted automatically or manually.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Gain Mode] and press the ENTER key.
Gain Mode options
4. Use the Cursorpad (S or T) to select [Auto] or [Manual] then press the ENTER
key. The window for Gain/Sea/Rain indicator shown below appears. [Auto] is for
adjusting the gain automatically. For [Manual], go to Manual mode below.
Gain/Sea/Rain indicator
5. Press the CANCEL/HL OFF key to close the window.
6. Press the MENU key to close the menu.
Note: When you want to adjust the gain finely in [Auto] mode, rotate the GAIN knob.
The confirmation message appears. If you select [Yes], the mode changes to [Manual]
mode. Rotate the GAIN knob to adjust the gain.
Confirmation message
Manual mode
1. Rotate the GAIN knob to adjust the gain so that weak noise appears on all of the
screen. If the gain is too low, weak echoes are erased. If the gain is too high, the
background noise hides weak targets.
2. Press the CANCEL/HL OFF key to close the window.
AUTO: Auto, MAN: Manual
Gain setting ba
r
Are you sure to change to manual mode?
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1. DESCRIPTION OF OPERATION
1-11
1.10 How to Reduce the Sea Clutter
The reflected echoes from the waves appear around your ship and have the name
"sea clutter". The sea clutter extends according to the height of waves and antenna
above the water. When the sea clutter hides the targets, use the A/C SEA control to
reduce the clutter, either manually or automatically.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Sea Mode] and press the ENTER key.
4. Use the Cursorpad (S or T) to select [Auto] or [Manual] then press the ENTER
key. The window for Gain/Sea/Rain indicator appears (refer to the illustration at
step 4 in section 1.9). [Auto] is for reducing the sea clutter automatically. For [Man-
ual], go to Manual mode below.
5. Press the CANCEL/HL OFF key to close the window.
6. Press the MENU key to close the menu.
Note: When you want to adjust the sea clutter finely in [Auto] mode, rotate the A/C
SEA knob. The confirmation message appears. If you select [Yes], the mode changes
to [Manual] mode. Rotate the A/C SEA knob to adjust the sea clutter.
Confirmation message
Manual mode
1. Rotate the A/C SEA knob to reduce the sea clutter.
Note: When the setting of the A/C SEA control is correct, the clutter is broken into
small dots, and small targets become identified. If the setting is not enough, tar-
gets are hidden in the clutter. If the setting is higher than necessary, both sea clut-
ter and targets disappear from the display. Normally adjust the control until the
clutter has disappeared to leeward, but a small amount of the clutter is visible
windward.
Sea clutter
2. Press the CANCEL/HL OFF key to close the window.
Are you sure to change to manual mode?
A/C SEA control adjusted;
sea clutter reduced
Sea clutter at
screen center
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1. DESCRIPTION OF OPERATION
1-12
1.11 How to Reduce the Rain Clutter
The reflections from the rain or snow appear on the screen. These reflections have the
name "rain clutter". When the rain clutter is strong, targets in the rain clutter are hidden
in the clutter. Reflections from the rain clutter are easily identified from true targets by
their wool-like appearance.
The A/C RAIN control, like the A/C SEA control, adjusts the receiver sensitivity, but in
longer range. If the setting is high, the rain clutter is more reduced. The rain control
breaks the continuous display of rain or snow reflections into a random pattern. When
the rain clutter hides the targets, adjust the rain control (automatic or manual) to re-
duce the clutter.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Rain Mode] and press the ENTER key.
4. Use the Cursorpad (S or T) to select [Auto] or [Manual] then press the ENTER
key. The window for Gain/Sea/Rain indicator appears (refer to the illustration of
step 4 at section 1.9). If you selected [Auto], go to step 5. For [Manual], go to Man-
ual mode below.
5. Press the CANCEL/HL OFF key to close the window.
6. Use the Cursorpad (S or T) to select [Auto Rain] and press the ENTER key.
Auto Rain options
7. Use the Cursorpad (S or T) to select [Calm], [Moderate] or [Rough] then press
the ENTER key. The window for Gain/Sea/Rain indicator appears for confirma-
tion.
[Calm]: For light rain
[Moderate]: When you can not reduce the rain clutter with [Calm] mode
[Rough]: For heavy rain
8. Press the CANCEL/HL OFF key to close the window.
9. Press the MENU key to close the menu.
Note: When you want to adjust the rain clutter finely in [Auto] mode, rotate the A/C
RAIN knob. The confirmation message appears. If you select [Yes], the mode chang-
es to [Manual] mode. Rotate the A/C RAIN knob to adjust the rain clutter.
Confirmation message
Are you sure to change to manual mode?
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1. DESCRIPTION OF OPERATION
1-13
Manual mode
1. Rotate the A/C RAIN knob to reduce the rain clutter.
2. Press the CANCEL/HL OFF key to close the window.
Rain clutter
1.12 Automatic Adjustments of Sea and Rain Clutters
When you can not correctly reduce the sea clutter or rain clutter with related control,
turn on the automatic anti-clutter feature. When this feature is turned on, "A/C AUTO"
appears at the lower-right corner.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [A/C Auto] and press the ENTER key.
4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
Caution on use
[A/C Auto] can lower an echo which covers a wide area, like land or an island.
When [A/C Auto] is active, the strength of a target in sea clutter or rain clutter can
be lower than actual strength. In this case change to manual A/C Sea and manual
A/C Rain and adjust the picture.
Rain clutter at
screen center
A/C RAIN control adjusted;
rain clutter reduced
A/C Auto: Off
A/C Auto: On
:£:¸
Land
:£:¸
Target
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1. DESCRIPTION OF OPERATION
1-14
1.13 Cursor
The cursor functions to find the range and bearing (default function) to a target or the
latitude and longitude position of a target. Use the Cursorpad to position the cursor
and read the cursor data at the screen bottom.
Cursor data
Cursor data
You can show the cursor data as range and bearing (from your ship to the cursor) or
latitude and longitude. Position and heading signal are required.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Others] and press the ENTER key.
Others menu
Cursor data
(range and bearing,
or latitutde and longitude)
110.1
° R
0.488
NM
NM
0.5
Curso
r
+
+
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1. DESCRIPTION OF OPERATION
1-15
3. Use the Cursorpad (S or T) to select [Cursor Position] and press the ENTER key.
Cursor Position options
4. Use the Cursorpad (S or T) to select [Rng/Brg] or [Lat/Lon] then press the EN-
TER key. (When the navigation data is displayed, cursor latitude and longitude po-
sition cannot be displayed.)
5. Press the MENU key to close the menu.
1.14 Interference Rejector
The radar interference can occur when your ship is near the radar of another ship that
operates on the same frequency band with your radar. The interference shows on the
screen as many bright dots. The dots can be random or in the shape of dotted lines
that run from the center to the edge of the display. You can identify the interference
from the normal echoes, because the interference does not appear in the same loca-
tion at the next antenna rotation. When this feature is turned on, "IR 1", "IR 2" or "IR
3" appears at the lower-right corner.
Interference
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Int Rejector] and press the ENTER key.
Int Rejector options
4. Use the Cursorpad (S or T) to select [Off], [1], [2] or [3] then press the ENTER
key. [3] removes the interference the most.
5. Press the MENU key to close the menu.
Note: When there is no interference, turn off the interference rejector so you do not
miss the small targets.
Indication at the lower-right corne
r
IR 1
IR 2
IR 3
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1. DESCRIPTION OF OPERATION
1-16
1.15 How to Measure the Range to a Target
You can measure the range to a target in three methods. You can use the fixed range
rings, the cursor (if set to measure range and bearing), and the VRM (Variable Range
Marker).
Use the fixed range rings to get a rough estimate of the range to a target. The fixed
range rings are the concentric solid circles about your ship. The number of rings
changes with the selected range scale. The interval of the range ring is displayed at
the upper-left corner of the screen. Count the number of rings between the center of
the display and the target. Check the range ring interval and measure the distance of
the echo from the nearest ring.
1.15.1 How to adjust range ring brilliance
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Brill/Color] and press the ENTER key.
Brill/Color menu
3. Use the Cursorpad (S or T) to select [Rings Brill] and press the ENTER key.
Rings Brill options
4. Use the Cursorpad (S or T) to select an option and press the ENTER key. [4] is
the brightest. [Off] turns off the range rings.
5. Press the MENU key to close the menu.
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1. DESCRIPTION OF OPERATION
1-17
1.15.2 How to measure the range with a VRM
There are two VRMs, No. 1 and No. 2. The VRMs are dashed rings so that you can
identify the rings from the fixed range rings. You can identify VRM 1 from VRM 2 by
different lengths of dashes. The dashes of the No. 1 VRM are shorter than those of
the No. 2 VRM.
1. Press the VRM key to display either of the VRMs. Press the VRM key to change
the active VRM between No. 1 and No. 2. The indication of the currently active
VRM is in a rectangle.
2. Use the Cursorpad to align the Variable Range Marker with the inner edge of the
target. Read the distance at the lower-right corner of the screen. Each VRM re-
mains at the same geographical distance when you operate the RANGE key. The
size of the VRM ring changes in proportion to the selected range scale.
3. Press the ENTER key to anchor the VRM.
4. To erase a VRM, press the VRM key to activate the VRM and press the CANCEL/
HL OFF key.
How to measure the range with the VRM
1.15.3 How to select VRM unit
You can select the unit of measurement used by the VRM. The selections are nautical
miles (NM), kilometers (KM), statute miles (SM) or kiloyard (KYD). The cursor range
unit is also changed when the VRM unit is changed.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Others] and press the ENTER key.
VRM 1
Cursor range and bearing
VRM 2
Target
+
VRM
5.044NM
2.082NM
Cursor (+)
VRM 1 range
VRM 2 range
+
The currently active VRM
is in a rectangle.
37.4
° R
5.044
NM
VECT
TRUE
05:00
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1. DESCRIPTION OF OPERATION
1-18
3. Use the Cursorpad (S or T) to select [VRM Unit] and press the ENTER key.
VRM Unit options
4. Use the Cursorpad (S or T) to select the unit and press the ENTER key.
5. Press the MENU key to close the menu.
1.16 How to Measure the Bearing to a Target
Use the Electronic Bearing Line (EBL) to take a bearing of a target. There are two
EBLs, No. 1 and No. 2. Each EBL is a straight dashed line from the center of the
screen to the edge. The dashes of the No. 1 EBL are shorter than those of the No. 2
EBL.
1.16.1 How to measure the bearing with an EBL
1. Press the EBL key to display either of the EBLs. Press the EBL key to change the
active EBL between No. 1 and No. 2. The indication of the currently active EBL is
in a rectangle.
2. Use the Cursorpad to put the EBL on the center of the target. Read the bearing at
the lower-left corner of the screen.
3. Press the ENTER key to anchor the EBL.
4. To erase an EBL, press the EBL key to activate the EBL and press the CANCEL/
HL OFF key.
How to measure the bearing with the EBL
NM: 0.1 NM or above
YD: Less than 0.1 NM
+
EBL
270.0
°
R
45.0
°
R
45.0
°
R
5.044
NM
+
EBL 1
EBL 2
Cursor range and bearing
Target
Cursor (+)
The currently active EBL
is in a rectangle.
EBL 1 bearing
EBL 2 bearing
VECT
TRUE
05:00
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1. DESCRIPTION OF OPERATION
1-19
1.16.2 EBL reference
"R" (relative) follows the EBL indication if the bearing is relative to the heading of your
ship. "T" (true) follows the EBL indication if the bearing is in reference to the north. You
can select relative or true in the head-up and true view modes. The bearing indication
is true in all other modes. True bearing requires a heading sensor.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Others] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [EBL Reference] and press the ENTER key.
EBL Reference options
4. Use the Cursorpad (S or T) to select [Relative] or [True] then press the ENTER
key.
5. Press the MENU key to close the menu.
1.17 How to Measure the Range and Bearing Between
Two Targets
You can move the origin of the EBL to measure the range and bearing between two
targets.
1. Press the EBL key to select the bearing indication of EBL 1 or EBL 2. The indica-
tion of the currently active EBL is in a rectangle.
2. Use the Cursorpad to put the cursor on the center of the target A.
3. Press the OFF CENTER key to move the origin of the EBL to the location selected
at step 2.
4. Use the Cursorpad to put the cursor on the center of the target B.
5. Press the VRM key to display the VRM having the same number as the EBL acti-
vated at step 1. The indication of the currently active VRM is in a rectangle.
6. Use the Cursorpad to set the VRM on the inner edge of the target B.
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1. DESCRIPTION OF OPERATION
1-20
7. Read the bearing and range indications at the bottom of the screen.
How to measure the range and bearing between two targets
When you press the OFF CENTER key in EBL operation, the origin of an EBL moves
between the screen center and cursor location. To return the origin of an EBL to the
screen center, press the ENTER key when the origin of an EBL is on the screen cen-
ter.
1.18 How to Select a Pulselength
The pulselength in use appears at the upper-left position on the screen. The pulse-
lengths are set to each range scale and custom setup. You can change the pulse-
length on the 1.5 nm, 1.6 nm, 3 nm or 3.2 nm range with the following procedure.
Pulselength cannot be changed on other ranges. (You can change the pulselength on
the 2 nm or 4 nm range in the [Russian-River] mode.) Use a longer pulse when your
purpose is long range detection. Use a shorter pulse when the resolution is important.
Note: Press the CUSTOM key several times to activate the [Echo] menu until the CS
1 (2, 3) indication (custom setting) disappears from the screen. See the illustration in
section 1.3.
1. Press the MENU key to open the menu.
EBL origin
+
+
Target B
Range/bearing between
targets A and B
Range/bearing between
targets C and D
EBL 2
VRM 2
EBL 1
VRM 1
EBL
45.0
°
R
327.0
°
R
VRM
0.550NM
0.550NM
Target A
Target D
Target C
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1. DESCRIPTION OF OPERATION
1-21
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
Echo menu
3. Use the Cursorpad (S or T) to select [Pulse Length] and press the ENTER key.
Pulse Length options
4. Use the Cursorpad (S or T) to select [Short] or [Long] then press the ENTER key.
The pulselength indication at the upper-left corner changes according to your se-
lection as shown below.
1.5 nm or 1.6 nm (or 2 nm in the [Russian-River] mode): "SP" for [Short] pulse,
"MP" for [Long] pulse
3 nm or 3.2 nm (or 4 nm in the [Russian-River] mode): "MP" for [Short] pulse, "LP"
for [Long] pulse
5. Press the MENU key to close the menu.
1.19 Target Alarm
The target alarm looks for targets
(ship, landmass, etc.) in the area
you set. Audiovisual alarms are
released when a target enters (or
exits) the alarm area.
CAUTION
CAUTION
·
Do not depend on the alarm as the only
means to detect possible collision
situations.
·
Adjust the A/C SEA, A/C RAIN and GAIN
controls correctly so that the alarm
system does not miss the target echoes.
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1. DESCRIPTION OF OPERATION
1-22
1.19.1 How to set a target alarm zone
The following procedure shows you how to set a target alarm zone.
1. Press the TARGET ALARM key to activate ALARM 1 or ALARM 2. Press the
TARGET ALARM key to change the active ALARM between No. 1 and No. 2. The
indication of the currently active ALARM is in a rectangle at the upper-right corner
of the screen.
2. Use the Cursorpad to move the cursor to the position A and press the ENTER key.
3. Move the cursor to the position B and press the ENTER key. The rectangle that
shows alarm status indication at the upper-right corner of the screen disappears.
How to set a target alarm zone
Note 1: To set a 360-degree guard zone, set the position B in the same bearing as the
position A.
Note 2: When the target alarm zone is not within the range in use, the indication
"ALM1(or 2)_RNG" replaces "ALM1(or 2)_IN(or OUT)" in the alarm status area.
(When the target alarm zone is within the range of full off-centering, the indication
does not change.) Select a range which displays the target alarm zone.
1.19.2 How to stop the audio alarm
When a target enters (or exits) the target alarm zone, the target flashes and the alarm
sounds. The alarm message appears at the bottom of the screen. To stop the audio
alarm, press any key. When the target enters (or exits) the target alarm zone again,
the audio alarm sounds.
Cursor
+
Target alarm zone 1
(Length of dash
and interval for
alarm zone 2 are
longer than alarm
zone 1.)
A
B
Alarm status
ALM1_IN
ALM2_OUT
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1. DESCRIPTION OF OPERATION
1-23
1.19.3 How to select the alarm type
You can set the target alarm to activate against targets entering or exiting the alarm
zone.
In and Out target alarms
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Alarm] and press the ENTER key.
Alarm menu
3. Use the Cursorpad (S or T) to select [Target Alarm 1] or [Target Alarm 2] then
press the ENTER key.
Target Alarm options
4. Use the Cursorpad (S or T) to select [In] or [Out].
[In]: When the targets enter a target alarm zone, the alarm sounds.
[Out]: When the targets exit a target alarm zone, the alarm sounds.
5. Press the ENTER key followed by the MENU key.
1.19.4 How to sleep a target alarm temporarily
When you do not require a target alarm temporarily, you can sleep the target alarm.
The alarm zone remains on the screen, but any targets that enter (or exit) the alarm
zone do not trigger the audio and visual alarms.
1. Press the TARGET ALARM key to select the ALARM 1 or ALARM 2 indication at
the upper-right corner on the screen. The selected indication is in a rectangle.
“In” target alarm
“Out” target alarm
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1. DESCRIPTION OF OPERATION
1-24
2. Press the CANCEL/HL OFF key. The alarm indication now shows "ALM1(or
2)_ACK".
To activate a sleeping target alarm zone, press the TARGET ALARM key to select the
ALARM 1 or ALARM 2 and press the ENTER key. The alarm indication then changes
to "ALM1(or 2)_IN(or OUT)".
1.19.5 How to deactivate a target alarm
1. Press the TARGET ALARM key to select the ALARM 1 or ALARM 2 indication at
the upper-right corner on the screen. The selected indication is in a rectangle.
2. Press the CANCEL/HL OFF key. The alarm indication now shows "ALM1(or
2)_ACK".
3. Press the TARGET ALARM key. The alarm indication "ALM1(or 2)_ACK" is
shown in a dashed-line rectangle.
4. Press the CANCEL/HL OFF key. The target alarm zone and the alarm indication
are erased from the screen.
1.19.6 How to select the target strength which triggers a target alarm
You can select the target strength which triggers the target alarm as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Alarm] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Alarm Level] and press the ENTER key.
Alarm Level options
4. Use the Cursorpad (S or T) to select the echo strength level.
5. Press the ENTER key followed by the MENU key.
1.19.7 How to turn the buzzer on/off
You can turn on/off the panel buzzer or external buzzer for target alarms. The panel
buzzer is for this equipment. The external buzzer is for the optional buzzer, which is
connected to this equipment to give the target alarm at a remote location.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Alarm] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Panel Buzzer] (or [External Buzzer] for op-
tional buzzer) and press the ENTER key.
Panel Buzzer and External Buzzer options
4. Use the Cursorpad (S or T) to select [On] or [Off] then press the ENTER key.
5. Press the MENU key to close the menu.
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1. DESCRIPTION OF OPERATION
1-25
1.20 How to Off-center the Display
You can off-center your ship position to expand the view field without selecting a larger
range scale. The display can be off-centered manually, or automatically according to
speed of the ship.
Note: Off-centering is not available in the true motion mode.
1.20.1 How to select the off-center mode
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Offcenter Mode] and press the ENTER
key.
Offcenter Mode options
4. Use the Cursorpad (S or T) to select [Manual], [Custom] or [Auto] then press the
ENTER key. Press the ENTER key to change between on and off.
5. After setting all options, use the Cursorpad (T) to select [EXIT? YES] and press
the ENTER key.
6. Press the MENU key to close the menu.
1.20.2 Off-center the display
Press the OFF CENTER key to move your ship position. When you press the OFF
CENTER key continuously, the mode changes in the sequence of OFF Manual
Custom Auto OFF Manual ... (the options available depend on setting se-
lected at step 4 in section 1.20.1). When off-centering is active, "OFFCENT(M)",
"OFFCENT(C)" or "OFFCENT(A)" appears at the upper-left corner on the display.
Note: Off-center is not available on the 64 nm range scale.
Manual (Indication: "OFFCENT(M)")
You can move your ship position to the current cursor position on all modes except
true motion, within 75% of the available display area.
1. Press the OFF CENTER key several times until the off-center indication disap-
pears.
2. Put the cursor on the position where to off-center the display.
3. Press the OFF CENTER key several times until the indication "OFFCENT(M)" ap-
pears.
Press the ENTER key
to change between
on and off.
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1. DESCRIPTION OF OPERATION
1-26
Custom (Indication: "OFFCENT(C)")
You can move your ship position to the position which you pre-set. Follow the proce-
dure shown below to register the cursor position.
1. Press the OFF CENTER key several times until the off-center indication disap-
pears.
2. Put the cursor on the position where to off-center the display.
3. Press the OFF CENTER key several times until the indication "OFFCENT(M)" ap-
pears.
4. Press the MENU key to open the menu.
5. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
6. Use the Cursorpad (S or T) to select [Save Offcenter] and press the ENTER key.
The message "Complete" appears.
7. Press any key to close the message window.
8. Press the MENU key to close the menu.
To change the mode to custom, press the OFF CENTER key several times until the
indication "OFFCENT(C)" appears.
Auto (Indication: "OFFCENT(A)")
The amount of automatic move is calculated according to speed of the ship. The max-
imum amount is 75% of the range in use. The formula to calculate automatic shift is
shown below.
If the offcenter speed setting is 15 knots and the speed of the ship is 10 knots, for ex-
ample, the amount of move at the stern of your ship will be 50% of the available display
area.
How to select offcenter speed
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Initial] sub menu in [System] menu and
press the ENTER key.
3. Use the Cursorpad (S or T) to select [Offcenter Speed] and press the ENTER
key.
Offcenter Speed setting window
4. Use the Cursorpad (S or T) to select the speed to use and press the ENTER key.
5. Press the MENU key to close the menu.
Offcenter speed setting
X 0.75 = Amount of move (%)
Speed of ship
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1. DESCRIPTION OF OPERATION
1-27
1.21 Zoom
The zoom function expands the length and width of a selected target as much as twice
its normal size, in the zoom window. You select the target to zoom with the zoom cur-
sor. The selected target is zoomed in the zoom window.
ARPA and AIS symbols can be displayed in the zoom window, but are not zoomed.
You can process ARPA and AIS targets that are in the zoom window, in the same
method as on the normal radar display.
There are three types of zoom.
[Relative]: The zoom cursor is fixed to the range and bearing from your ship.
[True]: The zoom cursor is fixed to set geographical position.
[Target]: The zoom cursor is fixed to the zoomed AIS or ARPA target.
1.21.1 Zoom mode
You can select the zoom mode from [Relative], [True] or [Target].
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Zoom Mode] and press the ENTER key.
Zoom Mode options
4. Use the Cursorpad (S or T) to select [Relative], [True] or [Target] then press the
ENTER key.
Note: True zoom mode requires a heading signal and position data.
5. Press the MENU key to close the menu.
1.21.2 How to zoom
Relative or True zoom mode
1. Use the Cursorpad to put the cursor on the position desired.
2. Press the MENU key to open the menu.
3. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
4. Use the Cursorpad (S or T) to select [Zoom] and press the ENTER key.
Zoom options
5. Use the Cursorpad (S or T) to select [On] and press the ENTER key.
The ZOOM indication appears at the upper-left corner on the screen. The zoom
window and the zoom cursor also appear (see the illustration on the next page).
To quit the zoom, select [Off] instead of [On] and press the ENTER key.
6. Press the MENU key to close the menu.
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1. DESCRIPTION OF OPERATION
1-28
Target zoom mode
The ARPA or AIS target as below can be displayed in the zoom window:
ARPA: The symbol is enlarged twice its normal size.
AIS: The symbol is enclosed in a broken square. (The symbol is not enlarged.)
The zoom cursor moves with the ARPA or AIS target.
Note: If neither ARPA nor AIS targets are selected, the message "NO TARGET." ap-
pears. Press any key to erase the message.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Zoom] and press the ENTER key.
4. Use the Cursorpad (S or T) to select [On] and press the ENTER key.
The ZOOM indication appears at the upper-left corner on the screen. The zoom
window and the zoom cursor also appear (see the following illustration). To quit
the zoom, select [Off] instead of [On] and press the ENTER key.
5. Press the MENU key to close the menu.
1.5
1.5
NM
NM
Zoom window
255.5
°
R
1.094
NM
ZOOM(T)
+
Zoom cursor
Zoom indication
VECT
TRUE
05:00
+
1.5
1.5
NM
NM
255.5
°
R
1.094
NM
ZOOM(T)
+
VECT
TRUE
05:00
+
Relative or True zoom mode
(example: true zoom)
Target zoom mode
(example: AIS)
999999000
999999000
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1. DESCRIPTION OF OPERATION
1-29
1.22 Echo Stretch
The echo stretch feature enlarges the targets in the range and bearing directions to
make the targets easier to see. This feature is available on any range. There are three
levels of echo stretch, [1], [2] and [3]. [3] enlarges the targets the most.
Note: The echo stretch magnifies the targets, sea and rain clutters, and radar interfer-
ence. Correctly adjust the sea clutter, rain clutter and radar interference before you ac-
tivate the echo stretch.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Echo Stretch] and press the ENTER key.
Echo Stretch options
4. Use the Cursorpad (S or T) to select an echo stretch option and press the EN-
TER key.
5. Press the MENU key to close the menu. When the echo stretch is active, "ES 1
(2, or 3)" appears at the lower-left corner on the display.
1.23 Echo Average
To identify true target echoes from the sea clutter, echoes are averaged over succes-
sive picture frames. If an echo is solid and stable, the echo is shown in its normal in-
tensity. The brilliance of sea clutter is reduced to easily identify true targets from the
sea clutter.
Note 1: Do not use the echo average function under heavy pitching and rolling. You
can lose a target.
Note 2: This feature requires a heading signal and position data. When either signal
becomes lost, echo average is deactivated.
To correctly use the echo average function, first reduce the sea clutter with the A/C
SEA control, then do as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Echo Average] and press the ENTER key.
Echo Average options
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1. DESCRIPTION OF OPERATION
1-30
4. Use the Cursorpad (S or T) to select an echo averaging option and press the EN-
TER key.
[Off]: Deactivate the echo average.
[1]: Identify true targets from the sea clutter and reduce the brilliance of unstable
echoes.
[2]: Identify true targets from the sea clutter that you cannot reduce the brilliance
with setting 1.
[Auto]: Identify true targets from the sea clutter. Detect far and unstable targets.
5. Press the MENU key to close the menu. The selected echo average ("EAV 1",
"EAV 2" or "EAV(A)") appears at the lower-left corner of the display.
1.24 Target Trails
The trails of the radar targets can be shown simulated in afterglow to check target
movement. The target trails are selected for either relative or true. True motion trails
require a heading signal and position data.
1.24.1 Trail time
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target Trails] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Time] and press the ENTER key.
Time options
4. Use the Cursorpad (S or T) to select time and press the ENTER key. Press the
ENTER key to change between on and off.
5. After setting all options, use the Cursorpad (T) to select [EXIT? YES] and press
the ENTER key.
6. Press the MENU key to close the menu.
Press the ENTER key
to change between
on and off.
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1. DESCRIPTION OF OPERATION
1-31
1.24.2 How to start, stop the trails
1. Press the TRAILS key to start the trails and select the trail time. The selected time
with the trail mode is shown at the upper-right corner as in the figure shown below.
The available trail time with the TRAILS key changes according to trail times,
which you turn on in section 1.24.1.
Trail indications
2. To change the trail time, press the TRAILS key until the desired trail time is dis-
played. The trail lengthens with the trail time.
Note 1: To erase the trails, press and hold the TRAILS key until a beep sounds, or
select [All Cancel] on the [Target Trails].
Note 2: To deactivate the trails, press the TRAILS key several times until the trail in-
dications disappear from the display.
1.24.3 Trail mode
You can display the echo trails in true or relative motion.
True mode
The true trails show true target movements according to their over-the-ground speeds
and courses. The stationary targets do not show the trails. The true trails require a
heading signal and position data.
Relative mode
The relative trails show other ships’ movements relative to your ship. The stationary
targets also show the trails.
True trails and relative trails
To select the trail mode, do the following:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target Trails] and press the ENTER key.
TRAIL(T)
15 S
Trail Mode (T: True, R: Relative)
Trail Time
True target trails
Relative target trails
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1. DESCRIPTION OF OPERATION
1-32
3. Use the Cursorpad (S or T) to select [Mode] and press the ENTER key.
Mode options
4. Use the Cursorpad (S or T) to select [Relative] or [True] then press the ENTER
key.
5. Press the MENU key to close the menu.
1.24.4 Trail gradation
Trails can be shown in single or multiple gradation. Multiple gradation fades the gra-
dation over time.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target Trails] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Gradation] and press the ENTER key.
Gradation options
4. Use the Cursorpad (S or T) to select [Single] or [Multi] then press the ENTER
key.
Trail gradation
5. Press the MENU key to close the menu.
1.24.5 Trail color
You can select the color for trails as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target Trails] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Color] and press the ENTER key.
Color options
4. Use the Cursorpad (S or T) to select a color and press the ENTER key.
5. Press the MENU key to close the menu.
Multiple
(Gradual shading)
Single
(Monotone shading)
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1. DESCRIPTION OF OPERATION
1-33
1.24.6 Trail level
You can select which target strength to display.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target Trails] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Level] and press the ENTER key.
Level options
4. Use the Cursorpad (S or T) to select [1], [2] or [3] then press the ENTER key.
[1]: Display the trails for all targets (including weak targets).
[2]: Display the trails for medium-to-strong level targets.
[3]: Display the trails for only strong targets.
5. Press the MENU key to close the menu.
1.24.7 How to restart, stop the trails
When the range is changed while the trail feature is active, trails within the previous
range scale can be stopped and restarted.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target Trails] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Restart] and press the ENTER key.
Restart options
4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.
[Off]: The previous trails data are saved when the range is changed. The trails are
not restarted and the saved trails are not updated. When you return the range
scale to the previous range scale, the saved trails are displayed and updated.
[On]: The previous trails are zoomed in or out depending on the changed scale
and updated.
How trail copy operates
Before changing range
After changing range
Copied trail picture
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1. DESCRIPTION OF OPERATION
1-34
Note: If the newly selected range is less than or equal to 1/4 of the previous range,
trails are erased. If the newly selected range is longer than the previous range, the
previous trails are left to be displayed.
5. Press the MENU key to close the menu.
1.24.8 Narrow trails
You can display the target trails in thin trails. When there are many targets on the
screen, you can separate trails close to one another with this function.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target Trails] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Narrow] and press the ENTER key.
Narrow options
4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
1.24.9 Your ship trail
You can show the trail of your ship as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target Trails] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Own Ship] and press the ENTER key.
Own Ship options
4. Use the Cursorpad (S or T) to select [Off], [1] or [2] then press the ENTER key.
[Off]: Hide the trail of your ship.
[1]: Show the trail of your ship.
[2]: Show the trail of your ship, but hide the trail of sea clutter near your ship.
5. Press the MENU key to close the menu.
1.25 How to Send the Target Position
The TLL key functions to send the cursor position to external navigator. Position and
heading signal are required. Use the Cursorpad to put the cursor on a target and press
the TLL key.
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1. DESCRIPTION OF OPERATION
1-35
1.26 How to Hide the Heading Line Temporarily
The heading line indicates the heading of your ship in all display modes. The heading
line is a line from your ship position to the outer edge of the radar display area. The
heading line appears at zero degrees on the bearing scale in head-up and true view
modes. The heading line changes the orientation depending on the ship orientation in
north-up and true motion modes and when the course is changed in the course-up
mode.
To hide the heading line (and all marks for River and Sea purpose) and display only
targets, press and hold the CANCEL/HL OFF key. To display the heading line again,
release the key.
1.27 Presentation Brilliance
You can adjust the brilliance for the following menu items from the [Brill/Color] menu.
[Echo Brill]: Brilliance for the echoes (setting range: 1 - 8)
[Rings Brill]: Brilliance for the range rings (setting range: Off, 1 - 4)
[Mark Brill]: Brilliance for the marks (EBL, VRM, etc.) (setting range: 1 - 4)
[HL Brill]: Brilliance for the heading line (setting range: 1 - 4)
[Character Brill]: Brilliance for the characters (setting range: 1 - 4)
1.28 Custom Setup
1.28.1 About custom setup
When your navigating environment or task changes, you must adjust the radar. In-
stead of changing radar settings case by case, you can assign the CUSTOM key to
provide best settings for common conditions.
There are three default custom setups for the internal computer of the radar (see the
table on the next page). You can adjust these settings on the [Custom 1], [Custom 2]
and [Custom 3] menus to meet your navigation needs.
To activate a custom setup, press the CUSTOM key. The CUSTOM key switches be-
tween Custom 1, Custom 2 or Custom 3 each time you press the key. (Custom setup
numbers which are turned off are ignored.) The selected custom setup name is shown
at the upper-left corner. To escape from custom setup, operate any control.
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1. DESCRIPTION OF OPERATION
1-36
1.28.2 Description of custom setup items
Description of custom setup items
Menu item Available settings See section
[Custom1(2 or 3)] Turn on/off each custom program.
[Copy] Copy settings from the [Echo] menu. The message "Com-
plete" appears after the copying is completed.
[Gain Mode] [Auto]: Automatic gain adjustment according to noise level
[Manual]: Manual gain adjustment
1.9
[Manual Gain] Copy the current position of the GAIN knob when you do
[Copy]. This item is for read-only.
[Sea Mode] [Auto]: Automatic sea clutter adjustment according to sea
state
[Manual]: Manual sea clutter adjustment
1.10
[Manual Sea] Copy the current position of the A/C SEA knob when you do
[Copy]. This item is for read-only.
[Rain Mode] [Auto]: Automatic rain clutter adjustment according to rain
cloud
[Manual]: Manual rain clutter adjustment
1.11
[Auto Rain] [Calm]: For light rain
[Moderate]: When you can not reduce the rain clutter with
[Calm] mode
[Rough]: For heavy rain
1.11
[Manual Rain] Copy the current position of the A/C RAIN knob when you do
[Copy]. This item is for read-only.
[A/C Auto] [Off], [On] 1.12
[Pulse Length] [Short] or [Long], you can select on 1.5, 1.6, 3.0 and 3.2 nm
ranges.
1.18
[Echo Stretch] [Off], [1], [2], [3] 1.22
[Echo Average] [Off], [1], [2], [Auto] 1.23
[Noise Rejector] [Off], [On] 1.30
[Wiper] [Off], [1], [2] 1.31
[Int Rejector] [Off], [1], [2], [3] 1.14
[Display-Dynamic] [Narrow]: Erase weak echoes.
[Normal]: Normal use
[Wide]: Display weaker echoes compared to [Narrow].
1.36
[Display-Curve] [1]: Reduce weak echoes.
[2]: Normal use
[3]: Display weaker echoes in stronger color compared to [1].
1.37
[Color Erase] 0 - 11 1.44.3
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1. DESCRIPTION OF OPERATION
1-37
1.28.3 How to set custom setups
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Custom 1 (2 or 3)] and press the ENTER
key.
Custom menu
3. Set menu items.
Note: For easy set up, you can copy the settings of the [Echo] menu (to [Custom
1], [Custom 2], [Custom 3]). Select [Copy] and press the ENTER key. When the
copying is completed, the message "Complete" appears. To erase this message,
press any key.
4. Press the MENU key to close the menu.
1.29 How to Program Function Keys (F1, F2 and F3
keys)
You can program function keys (F1, F2 and F3) to provide one-touch access to a re-
quired function.
Function key operation
To activate a function, press function key, F1, F2 or F3. Press same key to change the
setting.
The default programs are [Gain Mode] for F1, [Sea Mode] for F2, [A/C Auto] for F3.
When you press the F1 or F2 key, the window for Gain/Sea/Rain indicator shows. See
section 1.9 and 1.10 for operation. When you press the F3 key, [A/C Auto] is turned on.
How to change a function key program
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Others] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [F1 (F2 or F3) Setup] and press the ENTER
key.
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1. DESCRIPTION OF OPERATION
1-38
4. Use the Cursorpad (S or T) to select a function from the list and press the EN-
TER key. Below are the available functions.
Function list
5. Press the MENU key to close the menu.
1.30 Noise Rejector
White noise can appear on the screen as random "marks". You can reduce this noise
as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Noise Rejector] and press the ENTER key.
Noise Rejector options
4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
Rings Brill
Mark Brill
HL Brill
Character Brill
View Position
Display Color
Echo Color
Background Color
Character Color
Echo Color Mode
Display Mode
Zoom
Zoom Mode
Echo Area
Data Box
STBY Display
Gain Mode
Sea Mode
Rain Mode
Auto Rain
A/C Auto
Pulse Length
Echo Stretch
Echo Average
Noise Rejector
Wiper
Int Rejector
Display-Dynamic
Display-Curve
2nd Echo Rejector
Target Alarm 1
Target Alarm 2
Alarm Level
Watchman
Panel Buzzer
External Buzzer
Trails-Gradation
Trails-Color
Trails-Mode
Trails-Level
Trails-Restart
Trails-Narrow
Trails-Own Ship
Tuning Mode
WPT Mark
EBL Reference
VRM Unit
Cursor Position
Vector Reference
History Dots
History Interval
CPA
TCPA
Proximity
ARPA-Display
ARPA-Color
ARPA-Auto Acquisition
ARPA-ACK Lost Targets
AIS-Display
AIS-Color
AIS-Sort By
AIS-ACK Lost Targets
GPS-Mode
GPS-Datum
GPS-WAAS
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1. DESCRIPTION OF OPERATION
1-39
1.31 Wiper
The wiper feature automatically reduces the brilliance of unwanted weak signals
(noise, sea clutter, rain clutter, etc.) and unnecessary signals, like radar interference,
to clear the picture of unnecessary echoes. The result of wiper depends on the wiper
setting used and whether echo averaging is turned on or off, as described below.
Echo averaging and wiper states and wiper effect
Processing content A: The brilliance of unnecessary weak echoes, like noise and
radar interference, is reduced to clear the picture. The difference between wiper 1 and
2 is that brilliance is lowered more slowly in 1.
Processing content B: Echo averaging is automatically turned on from off when the
wiper feature is turned on. You can see how the picture changes with the echo aver-
aging turned off and turned on.
To activate the wiper feature, do the following:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Wiper] and press the ENTER key.
Wiper options
4. Use the Cursorpad (S or T) to select [1] or [2] then press the ENTER key.
5. Press the MENU key to close the menu.
Note: When the [Display Mode] is [True View], this function is not available (see sec-
tion 1.7.2).
1.32 How to Reduce Second-trace Echoes
Echoes from very distant targets can appear as false echoes (second-trace echoes)
on the screen. The second-trace echo occurs when the return echo is received one
transmission cycle later, or after a next transmission of radar pulse.
Second-trace echoes
Wiper 1 Wiper 2
Echo Average Off Processing content A
Echo Average On (1, 2, Auto) Processing content A Processing content B
Second-trace
echo
TX repetition
Actual range
False echo
range
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1. DESCRIPTION OF OPERATION
1-40
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [2nd Echo Rejector] and press the ENTER
key.
2nd Echo Rejector options
4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
1.33 Watchman
The Watchman sounds the buzzer to tell the operator to check the radar display. The
radar transmits for one minute and then goes into standby for the selected time inter-
val. If the target alarm is active and a target is found in the alarm zone, Watchman is
cancelled, and the radar transmits continuously.
How watchman operates
In standby, the timer near the <WATCH> label at the center of the screen counts down
the remaining time until the transmission. When the set time interval has passed, the
audio alarm sounds, the timer disappears and the radar transmits for one minute. After
one minute, the audio alarm sounds and the watch alarm timer again begins the count-
down sequence.
If you press the STBY/TX key before the set time interval comes, the radar goes into
transmission.
Do the following to activate the Watchman:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Alarm] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Watchman] and press the ENTER key.
Watchman options
4. Use the Cursorpad (S or T) to select [Off] or the time ([5min], [10min] or [20min])
then press the ENTER key.
5. Press the MENU key to close the menu.
ST-BY
5,10 or 20 min.
Tx
1 min.
Watchman
starts
*
* Beep sounds just before radar transmits
or goes into standby.
ST-BY
Tx
*
5,10 or 20 min.
1 min.
*
*
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1. DESCRIPTION OF OPERATION
1-41
1.34 Color Selections
1.34.1 Preset colors
This radar is preset with color combinations that provide best viewing in daytime,
nighttime and twilight. Below are the default color settings for each display item and
display color setting.
Display item, color design and color
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Brill/Color] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Display Color] and press the ENTER key.
Display Color options
4. Use the Cursorpad (S or T) to select the color design and press the ENTER key.
5. Press the MENU key to close the menu.
1.34.2 Custom colors
The custom color design lets you select preferred echo, background, characters,
range rings and marks colors. Select [Custom] in the [Display Color] menu item (see
section 1.34.1) to use the user selected echo, background, characters, range rings
and marks colors.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Brill/Color] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Echo Color] and press the ENTER key.
Echo Color options
4. Use the Cursorpad (S or T) to select an echo color and press the ENTER key.
[Multi] displays echoes in colors of red, yellow and green according to echo
strength, and [Multi] is not available in the [IEC] or [Russian-River] mode.
DIsplay item Day Night Twilight Custom
Characters Black Red Green Green
Range rings, marks Green Red Green Green
Echo Yellow Green Green Yellow
Background White Black Blue Black
Yellow
Green
Orange
Multi
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1. DESCRIPTION OF OPERATION
1-42
5. Use the Cursorpad (S or T) to select [Background Color] and press the ENTER
key.
Background Color options
6. Use the Cursorpad (S or T) to select a background color and press the ENTER
key.
7. Use the Cursorpad (S or T) to select [Character Color] and press the ENTER
key.
Character Color options
8. Use the Cursorpad (S or T) to select a character color (including range rings and
marks) and press the ENTER key.
9. Press the MENU key to close the menu.
Black
DK Blue
Blue
White
Green
Red
White
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1. DESCRIPTION OF OPERATION
1-43
1.35 Navigation Data
1.35.1 Navigation data during standby
The navigation data is shown in standby when [STBY Display] on the [Display] menu
is set to [Nav]. Appropriate sensors are required to display the data.
Navigation data display at standby
1.35.2 Navigation data at the bottom of the screen
The navigation data is displayed at the bottom of the screen.
Navigation data
Speed
Standby indication
Depth
Water temperature
Trip
Wind speed
Wind direction
Time until TX
in watchman
Heading indicator
Heading
Course
Time to go to
destination waypoint
Bearing to
destination
waypoint
Range to go to
destination waypoint
Waypoint mark
Your ship position
Cross track error
(numeric value)
Cross track error
(graphic): For example,
when the indicator is off
to the right side, steer
your ship to the left to go
to the destination waypoint.
- Cursor latitude position
- Cursor longitude position
- Time to go to cursor position
Your ship position and speed
- Bearing from your ship to waypoint
- Range from your ship to waypoint
- Time to go from your ship position to waypoint
LAT 34°56.123N
LON 135°34.567E
SPEED 12.3KN
LAT 34°56.123N
LON 135°34.567E
TTG 01:00
BRG
14.8°
RNG 0.876NM
TTG
00:20
OWN SHIP
+ CURSOR
WAY POINT
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1. DESCRIPTION OF OPERATION
1-44
To show or hide the navigation data at the bottom of the screen, do the following:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Data Box] and press the ENTER key.
Data Box options
4. Use the Cursorpad (S or T) to select an option and press the ENTER key.
[Off]: Turn off the data display.
[Nav]: Navigation data
[Target]: ARPA and AIS target data (See section 3.8 and 4.5.)
[All]: Navigation data plus ARPA and AIS target data
5. Press the MENU key to close the menu.
1.36 Dynamic Range
You can change the dynamic range to erase unwanted weak echoes (sea reflections,
etc.). Select [Narrow], [Normal] or [Wide] depending on conditions.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Display-Dynamic] and press the ENTER
key.
Display-Dynamic options
4. Use the Cursorpad (S or T) to select [Narrow], [Normal] or [Wide] then press the
ENTER key.
[Narrow]: Erase weak echoes.
[Normal]: Normal use
[Wide]: Display weaker echoes compared to [Narrow].
5. Press the MENU key to close the menu.
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1. DESCRIPTION OF OPERATION
1-45
1.37 Characteristics Curve
You can change the characteristics curve to reduce unwanted weak echoes (sea re-
flections, etc.). Select [1], [2] or [3] depending on conditions when unwanted weak
echoes hide wanted targets.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Echo] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Display-Curve] and press the ENTER key.
Display-Curve options
4. Use the Cursorpad (S or T) to select [1], [2] or [3] then press the ENTER key.
[1]: Reduce weak echoes.
[2]: Normal use
[3]: Display weaker echoes in stronger color compared to [1].
Display curve
5. Press the MENU key to close the menu.
3
2
1
Input level
Echo color
strength
Strong
Strong
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1. DESCRIPTION OF OPERATION
1-46
1.38 Waypoint Marker
The waypoint marker shows the location of the destination waypoint set on a naviga-
tion plotter. The heading signal or course data are required. You can turn on/off the
waypoint marker as follows:
Waypoint marker
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Others] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [WPT Mark] and press the ENTER key.
WPT Mark options
4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
1.39 Alarm Message
The alarm status window shows all currently violated alarms.
Note: The alarm status window is not automatically displayed when an alarm occurs.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Alarm] and press the ENTER key.
+
Waypoint
marker
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1. DESCRIPTION OF OPERATION
1-47
3. Use the Cursorpad (S or T) to select [Alarm Status] and press the ENTER key.
Alarm Status display
4. Press the CANCEL/HL OFF key to close the alarm status display.
5. Press the MENU key to close the menu.
Alarm category Meaning
SIGNAL MISSING*
TRIGGER Trigger signal lost (only for remote display)
HEADING Heading signal lost
BEARING Bearing signal lost
GYRO AD-10 format gyro signal lost
VIDEO Video signal lost
POSITION NMEA format position data lost
NMEA_HDG NMEA format heading signal lost
TARGET ALARM1(2)
IN An echo has entered a target alarm zone.
OUT An echo has exited a target alarm zone.
ARPA ALARM
COLLISION CPA and TCPA of an ARPA target is less than CPA and
TCPA alarm settings.
LOST Acquired ARPA target becomes lost.
PROXIMITY The range to an ARPA target is less than the user-set
proximity alarm range.
AIS ALARM
COLLISION CPA and TCPA of an AIS target is less than CPA and
TCPA alarm settings.
PROXIMITY The range to an AIS target is less than the user-set prox-
imity alarm range.
TRIGGER HEADING BEARING GYRO
VIDEO POSITION NMEA_HDG
IN OUT
IN OUT
COLLISION LOST PROXIMITY
COLLISION PROXIMITY
TX ANT CH1 CH2 CH70 FAIL MKD
EPFS L/L SOG COG HDG ROT
OVER_TEMP
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1. DESCRIPTION OF OPERATION
1-48
*: Have a qualified technician check the equipment.
1.40 Echo Area
You can select the display area from [Normal] or [Full Screen].
Echo area
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
AIS SYSTEM*
TX TX stopped or TX error
ANT Antenna VSWR problem
CH1 TDM2 RX1 board problem
CH2 TDM2 RX2 board problem
CH70 RX channel 70 problem
FAIL System failure
MKD Minimum input device lost
EPFS Navigator (GPS, etc.) problem
L/L Position data lost
SOG Speed data lost
COG Course data lost
HDG Heading data lost
ROT Rate of turn data lost
OTHER*
OVER_TEMP The temperature of the equipment is more than the spec-
ified value.
Alarm category Meaning
Normal
Full Screen
Area in which echoes are displayed
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1. DESCRIPTION OF OPERATION
1-49
3. Use the Cursorpad (S or T) to select [Echo Area] and press the ENTER key.
Echo Area options
4. Use the Cursorpad (S or T) to select [Normal] or [Full Screen] then press the EN-
TER key.
5. Press the MENU key to close the menu.
1.41 Initial Sub Menu
The [Initial] sub menu in the [System] menu contains the items which allow you to cus-
tomize your radar to meet your needs.
1.41.1 How to open the Initial sub menu
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Initial] and press the ENTER key.
Initial sub menu
1.41.2 Description of Initial sub menu
[Key Beep]: When a key is pressed, a beep sounds. You can turn on or off this beep.
[Offcenter Speed]: Set the speed of your ship to calculate amount of your ship’s off-
center. The setting range is 1-99 (kn).
[Compass Type]: Select the type of bearing sensor connected to the radar; [True]
(gyrocompass, satellite compass) or [Magnetic] (magnetic compass).
[Range Preset]: You can select the radar ranges. Select a range and press the EN-
TER key to switch on and off. At least two ranges must be turned on. The maximum
range available depends on the radar model. 0.0625 is not available in KM (kilome-
ters).
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1. DESCRIPTION OF OPERATION
1-50
NM (nautical miles) KM (kilometers) SM (statute miles)
Available ranges for MODEL 1835
NM (nautical miles) KM (kilometers) SM (statute miles)
Available ranges for MODEL 1935
NM (nautical miles) KM (kilometers) SM (statute miles)
Available ranges for MODEL 1945
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1. DESCRIPTION OF OPERATION
1-51
[Wind Direction]: Wind direction is shown as [Apparent] or [True].
[NMEA Port 1]: Set the baud rate of the equipment connected to Port 1 ([Auto],
[4800], or [38400] (bps)). [Auto] provides automatic detection of baud rate from 4800,
9600, 19200 or 38400 (bps).
[NMEA Port 2]: Same function as Port 1 but for Port 2.
[NMEA Mixing Out]: Data input to Port 1 may be output from Port 2 mixed with data
output to Port 2. Select [On] to use this feature.
1.42 Units Sub Menu
You can select the unit of measurement for range, ship speed, depth, temperature and
wind speed on the [Units] sub menu in the [System] menu. You can not open this sub
menu in normal operation. To open this menu, select [Units], hold the CANCEL/HL
OFF key and press the MENU key five times.
Units sub menu
[Range Unit]: NM, KM, SM
[Ship Speed Unit]: kn, km/h, mph
[Depth Unit]: m, ft, fa, pb, HR
[Temperature Unit]: °C, °F
[Wind Speed Unit]: kn, km/h, mph, m/s
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1. DESCRIPTION OF OPERATION
1-52
1.43 Sector Blank
You must prevent the transmission in some areas to protect passengers and crew
from microwave radiation. Also, if the reflections of echoes from the mast appear on
the screen, you must prevent the transmission in that area. You can set two sectors.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Sector Blanks] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Sect-Blank 1 (or 2) Status] and press the
ENTER key.
Sect-Blank Status options
4. Use the Cursorpad (S or T) to select [On] and press the ENTER key.
5. Use the Cursorpad (S or T) to select [Sect-Blank 1 (or 2) Start] and press the
ENTER key.
Sect-Blank Start setting window
6. Use the Cursorpad (S or T) to set the start point of the sector and press the EN-
TER key.
7. Use the Cursorpad (S or T) to select [Sect-Blank 1 (or 2) End] and press the EN-
TER key.
Sect-Blank End setting window
8. Use the Cursorpad (S or T) to set the end point of the sector and press the EN-
TER key.
Note 1: You can not set the sector more than 180 degrees.
Note 2: You can not set the total width of sector 1 and sector 2 more than 270
degrees.
9. Press the MENU key to close the menu.
As shown in the following illustration, dashed lines mark the start and end points of the
sector.
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1. DESCRIPTION OF OPERATION
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Sector blank
1.44 Other Menu Items
This section describes the menu items not previously described.
1.44.1 Menu items on the [Brill/Color] menu
[View Position]: You can select the angle from where you see the screen.
View Position options
[Echo Color Mode]: You can select the color palette from [System] or [Custom]. [Sys-
tem] is the pre-set color palette and [Custom] is the color palette you can set yourself.
This function is not available in the [IEC] or [Russian-River] mode.
Echo Color Mode options
+
Area of no
transmission
Start bearing
of sector
End bearing
of sector
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1. DESCRIPTION OF OPERATION
1-54
[Custom Echo Color]: You can customize the echo color with the following two meth-
ods. This function is not available in the [IEC] or [Russian-River] mode.
Custom Echo Color setting window
Method 1: 1) Select the echo rank to change on the [Rank] (setting range: 1 - 31).
2) Set the RGB values for selected echo rank on the [Red], [Green] and
[Blue] (setting range: 0 - 63).
Method 2: 1) Select 31 on the [Rank].
2) Set the RGB values for 31 echo rank on the [Red], [Green] and [Blue]
(setting range: 0 - 63).
3) Interpolate the RGB values between the maximum rank and minimum
rank on the [Fitting To Curve] with the following curves (setting range:
-20 to 20).
Setting range > 0: Logarithmic curve, useful to emphasize the weak
echoes.
Setting range = 0: Straight line
Setting range < 0: Exponential curve, useful to emphasize the strong
echoes.
[Copy To Custom]: Copy the color palette from [System] to [Custom].
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1. DESCRIPTION OF OPERATION
1-55
1.44.2 Menu items on the [Display] menu
[Base Text Display]: You can select on/off for the text indications of the following
items on the display. The settings on this function are used when you set [Echo Area]
to [Full Screen] on the [Display] menu. This function is not available in the [IEC] or
[Russian-River] mode.
Base Text Display options
The text indications set to off appear when you operate any key. The indications dis-
appear when there is no key operation for 10 seconds.
[Gain/Sea/Rain Bar]: Open the Gain/Sea/Rain indicator. You can check the current
settings.
Gain/Sea/Rain Bar
[STBY Display]: Set the function of the standby display.
STBY Display options
[Normal]: Display "ST-BY" at the screen center.
[Nav]: Display navigation data.
[Economy]: Turn off the backlight of the LCD. The radar must be switched from
TX to ST-BY to activate this mode.
Press the ENTER key
to change between
on and off.
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1. DESCRIPTION OF OPERATION
1-56
1.44.3 Menu items on the [Echo] menu
[Color Erase]: Erase the lower echo color whose level is set here. Set a large value
to display only the stronger echoes.
Color Erase setting window
1.45 Remote Display
You can use this radar as a remote display when you set [Input Source] to [Slave] on
the [Installation] sub menu. When this setting is done, the menu and display change
as described below. To display the radar image on the remote display, transmit from
the main radar.
Note: The message "Please turn to STBY-mode when you change this setting." ap-
pears when you switch the mode in transmission.
Unavailable menu items
The menu items are not available with the remote display as shown in the table.
Display appearance
The display changes as shown in the following illustration.
Transmitting or standby display indications for remote display
Menu Unavailable menu item(s)
[Echo] [Pulse Length], [2nd Echo Rejector]
[Custom 1, 2, 3] [Pulse Length]
[Alarm] [Watchman]
[Tuning] All menu items are inoperative.
[System] - [Sector Blanks] All menu items are inoperative.
[System] - [Installation] [Antenna Rotation], [MBS Adjust],
[Auto Install Setup], [Total TX Time]
HDG
OFFCENT(M)
Shown when display
unit functions as
remote display.
Tuning indicator
is not displayed.
Pulselength
is not displayed.
WTC is not displayed.
SLAVE
0.5
NM
0.125
CS1
H UP
TRAIL(T)
06MIN
ALM1_ACK
ALM2_OUT
359.9°
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1. DESCRIPTION OF OPERATION
1-57
Items unavailable with Function key F1, F2 and F3
[Pulse Length] ([Echo] menu)
[2nd Echo Rejector] ([Echo] menu)
[Watchman] ([Alarm] menu)
[Tuning Mode] ([Tuning] menu)
Total TX time indication
The total TX time (TX TIME XXXXXX.XH) does not appear on the diagnostic test or
on the Normal standby display.
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1. DESCRIPTION OF OPERATION
1-58
This page is intentionally left blank.
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2-1
2. DESCRIPTION OF RADAR
2.1 General
2.1.1 Minimum and maximum ranges
Minimum range
The minimum range is defined by the shortest distance at which, using a scale of
0.0625 or 0.125 nm, a target having an echoing area of 10 m
2
is shown separate from
the point representing the antenna position.
The minimum range depends on the pulselength, antenna height, and signal process-
ing (like main bang suppression and digital quantization). Use a shorter range scale
as far as it gives favorable definition or clarity of picture. This MODEL 1835 series
meets the requirements of IEC 62252 5.14.1 (Class A).
Maximum range
The maximum detection range, Rmax, varies depending on the height of the antenna,
the height of the target above the sea, the size, shape and material of the target, and
the atmospheric conditions.
Under normal atmospheric conditions, the maximum range is equal or a little shorter
than the optical horizon. The radar horizon is longer than the optical one by approxi-
mately 6% because of the diffraction property of the radar signal. The Rmax is shown
in the following formula.
If the height of the antenna is 9 m and the height of the target is 16 m, the maximum
radar range is;
Note: The detection range is reduced by precipitation (which absorbs the radar sig-
nal).
R
max
= 2.2 x ( h1 + h2)
where R
max
: radar horizon (nautical miles)
h1: antenna height (m)
h2: target height (m)
Radar horizon
Optical horizon
R
max
= 2.2 x ( 9 + 16) = 2.2 x (3 + 4) = 15.4 nm
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2. DESCRIPTION OF RADAR
2-2
2.1.2 Radar resolution
The bearing resolution and range resolution are important in radar resolution.
Bearing resolution
The bearing resolution is the ability of the radar to display the echoes received from
two targets at the same range as the separate echoes. The bearing resolution is pro-
portional to the antenna length and the wavelength.
Range resolution
The range resolution is the ability to display the echoes received from two targets on
the same bearing as separate echoes. The range resolution is determined by only
pulselength.
The test targets used to determine the range and bearing resolution are radar reflec-
tors that have an echoing area of 10 m
2
.
Targets
Targets
Horizontal beam width
Horizontal beam width
Separate
target echoes
Overlapped
target echoes
Separate
target echoes
Overlapped
target echoes
Targets
Targets
Overlapping
Transmission
pulse
Transmission
pulse
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2. DESCRIPTION OF RADAR
2-3
2.1.3 Bearing accuracy
One of the most important features of the radar is how accurately the bearing of a tar-
get can be measured. The accuracy of bearing measurement depends on the narrow-
ness of the radar beam. The bearing is taken relative to the heading of the ship.
Correct adjustment of the heading line at installation is important to get accurate bear-
ings. To minimize the error when you measure the bearing of a target, put the target
echo at the extreme position on the screen by selecting a suitable range.
2.1.4 Range measurement
Measurement of the range to a target is important function of the radar. There are
three methods of measuring range: the fixed range rings, the Variable Range Marker
(VRM), and the cursor (if set to measure range and bearing). The fixed range rings
appear on the screen with a given interval and provide a rough estimate of the range
to a target. The diameter of VRM is increased or decreased so that the marker touches
the inner edge of the target (see section 1.15.2). The VRM is a more accurate range
measurement than the fixed range rings. For cursor, see section 1.13.
2.2 False Echoes
The echo signals can appear on the screen at positions where there is no target or
disappear when there are targets. These false echoes are shown below.
2.2.1 Multiple echoes
Multiple echoes occur when a transmitted pulse returns from a solid object like a large
ship, bridge, or breakwater. A second, a third or more echoes can be seen on the dis-
play at double, triple or other multiples of the actual range of the target as shown be-
low. You can reduce and remove the multiple reflection echoes with the A/C SEA
control.
Multiple echoes
Y
our ship
Target
True
echo
Multiple
echo
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2. DESCRIPTION OF RADAR
2-4
2.2.2 Sidelobe echoes
When the radar pulse is transmitted, some radiation escapes on each side of the
beam, called "sidelobes”. If a target is where a target can be detected by the sidelobes
as well as the mainlobe, the side echoes can be shown on both sides of the true echo
at the same range. Sidelobes show normally only on short ranges and from strong tar-
gets. You can reduce the sidelobes with the A/C SEA control.
Sidelobe echoes
2.2.3 Virtual image
A large target close your ship can appear at two positions on the screen. One of them
is the true echo reflected by the target. The other is a false echo which is caused by
the mirror effect of a large object on or close your ship as shown in the following figure.
If your ship comes close to a large metal bridge, for example, a false echo can tempo-
rarily appear on the screen.
Virtual image
True target
Mainlobe (beam)
Antenna
Sidelobe
False echoes by sidelobes
Sidelobe
True
echo
False
echo
Your ship
Target ship
Mirror image
of target ship
Bridge
Route for direct reflection
Route for
indirect reflection
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2. DESCRIPTION OF RADAR
2-5
2.2.4 Shadow sector
Funnels, stacks, masts, or derricks near the antenna interrupt the radar beam, and a
non-detecting sector can occur. Targets can not be detected within this sector.
Shadow sector
Wharf and its echo
Large ship
Shadow sector
occurs because
wharf is hidden
behind ship.
Size of blind sector depends
on size of obstruction and range.
Radar position
Radar position
Wharf and its echo
Shadow sector occurs
because obstruction
(like mast) is in path
of radar beam.
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2. DESCRIPTION OF RADAR
2-6
2.3 SART (Search and Rescue Transponder)
2.3.1 SART description
When any X-band radar reaches within a range of approximately 8 nm, a Search and
Rescue Transponder (SART) sends a response to the radar signal. The transmitter
signal of response is 12-sweeps signal between 9,500 MHz to 9,200 MHz. The time
of slow sweep signal is 7.5 μs and the time of fast sweep signal is 0.4 μs. When the
radar receives this SART signal, a line of 12 dots appears. When the position of SART
is distant, the radar display shows only slow sweep signals like the illustration of
screen A.
When the radar reaches the SART within approximately 1 nm, the radar display can
also show the 12 responses of fast sweep signals like the illustration of screen B. The
position of the SART is the closest position of the radar echoes.
SART echo
9500 MHz
9200 MHz
Radar antenna
beamwidth
Screen A: When SART is distant
Screen B: When SART is close
Echo from SART
Position of
SART
Your ship
position
Your ship
position
SART mark
length
Radar receiver
bandwidth
Sweep time
7.5 µs
95 µs
Sweep start
High speed sweep signal
Low speed sweep signal
24 NM
1.5 NM
Position o
f
SART
Echo from
SART
Lines of 12 dots are displayed in
concentric arcs.
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2. DESCRIPTION OF RADAR
2-7
2.3.2 General remarks on receiving SART
SART range errors
When the SART is at a range greater than approximately 1 nm, the first dot is dis-
played at 0.64 nm beyond the true position of the SART. When the range closes so
that the fast sweep responses are seen also, the first range echoes are displayed at
150 m beyond the true position.
Range scale
When you find the SART position, do as follows:
1. Use the RANGE key to set the range scale to 6 nm or 12 nm.
2. Turn off [A/C Auto].
3. Turn off [Int Rejector].
SART display
To display only the SART echo clearly on the radar screen, reduce the tuning on man-
ual mode. The normal radar echoes get weak, however, the SART echoes remain.
Your ship comes close to the SART, the arc for the SART display becomes larger.
Most of the radar screen becomes fuzzy. Adjust the A/C SEA and GAIN controls to
display the necessary screen.
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2. DESCRIPTION OF RADAR
2-8
2.4 RACON
A RACON is a radar beacon which emits radar-receivable signals in the radar frequen-
cy spectrum (X- or S-band). There are several signal formats; in general, the RACON
signal appears on the radar screen as a rectangular echo originating at a point just
beyond the position of the radar beacon. It has a Morse coded pattern. Note that the
position on the radar display is not accurate.
RACON
Echoes on the radar screen
Echo description
Your ship position
RACON signal
RACON station
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3-1
3. ARPA OPERATION
The Automatic Radar Plotter ARP-11 (option) manually or automatically acquires and
tracks ten targets. Once a target is acquired automatically or manually, a target is au-
tomatically tracked within 0.1 to 16 nm.
3.1 Precautions for Use
3.2 Controls for Use with ARPA
ENTER: Acquire cursor-selected target. Display data for tracked target (in the data
box at the bottom of the screen).
CANCEL/HL OFF: Remove data of cursor-selected tracked target from the data box.
Stop tracking the cursor-selected target (when its data is not displayed in the data
box).
MENU: Access the [Target] and [ARPA] menus for ARPA operations.
Cursorpad: Select a target to acquire (or cancel the tracking). Select a target to show
(or remove) target data.
Do not depend on one navigation device
for the navigation of the ship. The
navigator must check all aids available
to confirm position. Electronic aids are
not a replacement for basic navigation
principles and common sense.
· The ARPA automatically tracks an
automatically or manually acquired radar
target and calculates its course and
speed, indicating them by a vector. Since
the data from the auto plotter depend on
the selected radar targets, the radar must
be optimally tuned for use with the auto
plotter, to ensure required targets will not
be lost or unnecessary targets like sea
returns and noise will not be acquired
and tracked.
· A target is not always a landmass, reef,
ship, but can be returns from the sea
surface and clutter. As the level of clutter
changes with the environment, the
operator must correctly adjust the A/C
SEA, A/C RAIN and GAIN controls so
that the target echoes do not disappear
from the radar screen.
The plotting accuracy and response of
this ARPA meets IMO standards.
The tracking accuracy is affected by the
following:
· The tracking accuracy is affected by
course change. One to two minutes is
required to restore vectors to full
accuracy after a sudden course change.
(The actual amount depends on
gyrocompass specifications.)
· The amount of tracking delay is inversely
proportional to the relative speed of the
target. Delay is on the order of 15-30
seconds for high relative speed; 30-60
seconds for low relative speed.
The display accuracy is affected by the
following:
· Echo intensity
· Pulse width of radar transmission
· Radar bearing error
· Gyrocompass error
· Course change (your ship or target)
CAUTION
CAUTION
CAUTION
CAUTION
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3. ARPA OPERATION
3-2
3.3 ARPA Display On/Off
You can turn the ARPA display on or off. The system continuously tracks ARPA tar-
gets regardless of this setting.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [ARPA] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
ARPA-Display options
4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
3.4 How to Acquire and Track the Targets
Ten targets are acquired and tracked manually or automatically.
3.4.1 Manual acquisition
You can acquire up to ten ARPA targets. When the automatic acquisition ([Auto Ac-
quisition] on the [ARPA] menu) is set to on, you can manually acquire up to five tar-
gets.
1. Use the Cursorpad to put the cursor on the target to acquire.
2. Press the ENTER key.
The ARPA target symbol changes over time as below. A vector which indicates the
motion direction of the target appears approximately one minute after acquisition.
ARPA target symbol
Target number
River and Sea (Non-IEC system): An acquired target gets the youngest unused
number. When a target is lost and disappears from the number list, the next acquired
target takes the number of that lost target (ie; In a 5 target list, if the target 2 is lost, the
next acquired target takes the number of target 2).
IEC and Russian-River (IEC system): An acquired target gets the youngest unused
number. When a target is lost and disappears from the number list, the next acquired
target takes the next sequential number until reaching a maximum 10. If the target
number reaches a maximum 10, the next acquired target takes the number of a pre-
viously lost target.
A
t acquisition
1 min. after
acquisition
3 min. after
acquisition
01
Target number
Vector
01
01
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3. ARPA OPERATION
3-3
3.4.2 Automatic acquisition
When you set an automatic acquisition area, the ARPA can acquire up to five targets
automatically.
The automatic acquisition area is 2.0 to 2.5 nm in range and ±45° on either side of the
heading line in bearing. When you change the automatic acquisition to manual acqui-
sition, targets being tracked in automatic acquisition are continuously tracked.
Automatic acquisition area
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [ARPA] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Auto Acquisition] and press the ENTER
key.
Auto Acquisition options
4. Use the Cursorpad (S or T) to select [On] and press the ENTER key.
5. Press the MENU key to close the menu.
3.5 How to Stop the Tracking of ARPA Target
When ten targets have been acquired, no more acquisition occurs unless targets are
cancelled. If you acquire additional targets, you must cancel one or more individual
targets, or all targets. Use one of the following procedures.
3.5.1 How to stop the tracking of selected targets
1. Use the Cursorpad to put the cursor on the target to cancel the tracking.
2. Press the CANCEL/HL OFF key to cancel the tracking and erase the ARPA sym-
bol. The unit beeps twice and the symbol is erased from the screen.
3.5.2 How to stop the tracking of all targets
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [ARPA] and press the ENTER key.
Automatic acquisition area
45° port
45° starboard
2.0 - 2.5 nm
Heading line
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3. ARPA OPERATION
3-4
3. Use the Cursorpad (S or T) to select [All Cancel] and press the ENTER key.
All Cancel options
4. Use the Cursorpad (S) to select [Yes] and press the ENTER key. All symbols are
erased from the screen and the long beep sounds.
5. Press the MENU key to close the menu.
3.6 Vector Attributes
3.6.1 What is a vector?
A vector is a line extending from a tracked target. A vector shows speed and course
of the target. The top of a vector shows estimated position of the target after the se-
lected vector time elapses. If you extend the vector length (time), you can evaluate the
risk of collision with any target.
When vector time is 15 minutes
3.6.2 Vector time and vector reference
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target] and press the ENTER key.
Target menu
Vector
Current position of the target
Vector time
Vector time
Vector time
Predicted position of the target in 15 minutes late
r
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3. ARPA OPERATION
3-5
3. Use the Cursorpad (S or T) to select [Vector Time] and press the ENTER key.
Vector Time setting window
4. Use the Cursorpad (S or T) to select time and press the ENTER key.
5. Use the Cursorpad (S or T) to select [Vector Reference] and press the ENTER
key.
Vector Reference options
6. Use the Cursorpad (S or T) to select [Relative] or [True] then press the ENTER
key. This function is not activate for [IEC] or [Russian-River] purpose. The mode
is set to [True].
[Relative]: Other ships’ vectors are displayed relative to your ship. This mode
helps find targets on a collision course. If a ship is on a collision course with your
ship, the vector of a ship points toward your ship position.
[True]: Your ship’s and other ships’ vectors are displayed at their true motions.
This mode helps discriminate between moving and stationary targets.
7. Press the MENU key to close the menu.
Note: The functions of the [Target] menu are shared by ARPA and AIS.
3.6.3 Vector of your ship
The vector of your ship is shown as an arrow from your ship position. The vector of
your ship is shown on the following conditions:
Connect ARP-11 (option)
Select [True] on the menu item [Vector Reference] on the [Target] menu
Independent of on/off on the menu item [Display] on the [ARPA] menu
Note: The vector of your ship is shown in the same color as the ARPA symbol color
(see section 3.12).
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3. ARPA OPERATION
3-6
3.7 History Display (target past position)
This radar can display time-spaced dots (maximum ten dots) that mark the past posi-
tions of any tracked ARPA target. You can evaluate actions of a target by the spacing
between dots. Below are examples of dot spacing and target movement.
Target movement and history display
You can select the number of history dots to display and the time interval to display
the history dots.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [History Dots] and press the ENTER key.
History Dots options
4. Use the Cursorpad (S or T) to select number of history dots to display (5 or 10)
or select [Off] to turn off the history display.
5. Press the ENTER key.
+
Vector of
your ship
01
Data box
02
Cursor
03
04
(a) Ship turning
(b) Ship running
straight
(c) Ship reduced
speed
(d) Ship increased
speed
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3. ARPA OPERATION
3-7
6. Use the Cursorpad (S or T) to select [History Interval] and press the ENTER key.
History Interval options
7. Use the Cursorpad (S or T) to select the time interval and press the ENTER key.
8. Press the MENU key to close the menu.
3.8 ARPA Target Data
You can show the data for a tracked ARPA target in the data box at the bottom of the
screen. To display ARPA target data, the menu item [Display] on the [ARPA] menu
must be set for [On] and the menu item [Data Box] on the [Display] menu must be set
for [Target] or [All].
1. Use the Cursorpad to put the cursor on an ARPA target.
2. Press the ENTER key to show the data of the target.
ARPA target data
The symbol for the selected ARPA target is enlarged double to distinguish from other
symbols.
To remove the data of a target from a data box, put the cursor on its target symbol and
press the CANCEL/HL OFF key.
TRUE 05:00 <ARPA> No. 01
BRG
53.7°T
RNG 2.987NM CRS 350.4° SOG 23.45KN
CPA 1.65NM TCPA
06:14
Vector reference
Vector time
Target no.
Bearing, range, course, speed
CPA, TCPA
+
ARPA target
selected for
data display
01
ARPA target
Data box
02
Cursor
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3. ARPA OPERATION
3-8
3.9 CPA/TCPA Alarm
Set CPA (Closest Point of Approach) alarm range and TCPA (predicted Time to CPA)
alarm time to alert you to targets that can be on a collision course. When CPA and
TCPA of any ARPA target become less than the preset CPA and TCPA alarm settings,
the audio alarm sounds. The alarm message "COLLISION" appears. The target sym-
bol changes to a dangerous target symbol (triangle) and flashes with its vector. You
can stop the audio alarm with any key. The flashing of the triangle stops when the
tracked ARPA target is not in the CPA and TCPA alarm setting. The ARPA continu-
ously monitors CPA and TCPA of all tracked ARPA targets.
Dangerous target symbol
This feature helps identify targets that can be on a collision course. Correctly adjust
GAIN, A/C SEA, A/C RAIN and other radar controls.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [CPA] and press the ENTER key.
CPA options
4. Use the Cursorpad (S or T) to select CPA distance and press the ENTER key.
CAUTION
CAUTION
Do not depend on the CPA/TCPA alarm
as the only method to detect the risk of
collision. The navigator is not released
of the responsibility to keep visual caution
for collision situations, whether or not the
radar or other plotting aid is in use.
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3. ARPA OPERATION
3-9
5. Use the Cursorpad (S or T) to select [TCPA] and press the ENTER key.
TCPA options
6. Use the Cursorpad (S or T) to select TCPA and press the ENTER key.
7. Press the MENU key to close the menu.
3.10 Proximity Alarm
The proximity alarm alerts you when an ARPA target is within the range you set. The
audio alarm sounds and the alarm message "PROXIMITY" appears. The target sym-
bol changes to a dangerous target symbol (triangle, see section 3.9) and flashes with
its vector. Press any key to stop the audio alarm. The flashing continues until the tar-
get is not within the range set, the alarm range is changed to exclude the target, or the
proximity alarm is deactivated.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Proximity] and press the ENTER key.
Proximity options
4. Use the Cursorpad (S or T) to select the range and press the ENTER key.
5. Press the MENU key to close the menu.
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3. ARPA OPERATION
3-10
3.11 Lost Target
When the system detects a lost target, the audio alarm sounds and the alarm mes-
sage "LOST" appears. The target symbol becomes a flashing square like the following
illustration. When the system detects the target again, the target symbol becomes a
normal symbol.
Lost target symbol
To erase a lost target symbol, put the cursor on the symbol and press the CANCEL/
HL OFF key. If you leave a lost target symbol flashing, the symbol disappears after
one minute.
You can remove all lost ARPA targets from the screen as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [ARPA] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [ACK Lost Targets] and press the ENTER
key.
ACK Lost Targets options
4. Use the Cursorpad (S) to select [Yes] and press the ENTER key. All lost targets
symbols are erased from the screen and the long beep sounds.
5. Press the MENU key to close the menu.
3.12 Symbol Color
You can select the ARPA symbol color from Green, Red, Blue, White or Black.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [ARPA] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Color] and press the ENTER key.
Color options
4. Use the Cursorpad (S or T) to select the color and press the ENTER key.
5. Press the MENU key to close the menu.
Note: Symbols can not be shown in the same color as the background color.
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4-1
4. AIS OPERATION
Connected to the FURUNO AIS Transponders FA-150, FA-100, FA-50 or the AIS Re-
ceiver FA-30, the MODEL 1835 series can show the name, position and other naviga-
tion data of the nearest 100 AIS transponder-equipped ships.
This radar accepts position data fixed by WGS-84 geodetic datum. Set the datum to
WGS-84 on the GPS navigator connected to this radar. If this radar is interfaced with
the FURUNO GPS Navigator GP-320B, see section 5.2 for the procedure.
4.1 Controls for Use with AIS
ENTER: Activate cursor-selected target. Display data for selected active target (in the
data box at the bottom of the screen).
CANCEL/HL OFF: Remove data of cursor-selected AIS target from the data box.
Sleep cursor-selected target (when its data is not displayed in the data box).
MENU: Access the [Target] and [AIS] menus for AIS operations.
Cursorpad: Select a target to activate (or sleep). Select a target to show (or remove)
target data.
4.2 AIS Display On/Off
You can turn the AIS display on or off. The system continues processing AIS targets
regardless of on/off for AIS display when the AIS transponder is turned on.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [AIS] and press the ENTER key.
AIS menu
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4. AIS OPERATION
4-2
3. Use the Cursorpad (S or T) to select [Display] and press the ENTER key.
AIS-Display options
4. Use the Cursorpad (S or T) to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
4.3 AIS Symbols
When the AIS is turned on, AIS targets are displayed with AIS symbol as below.
AIS symbols
Note: The AIS symbols are momentarily erased after the screen is redrawn when the
heading is changed on the head-up mode.
4.4 Activating, Sleeping Targets
When you change a sleeping target to an activated target, a vector shows the course
and speed of that target. You can easily judge the target movement by the vector.
Activated target
Sleeping
target
Activated
target
Dangerous
target
Lost target Target selected
for data display
Heading line
SOG (Speed Over Ground) and
COG (Course over Ground) vector
(If there is no heading data,
the line points in direction of COG.)
ROT
(Rate of Turn)
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4. AIS OPERATION
4-3
When there are many activated targets on the screen, you can not easily distinguish
the activated targets from the radar images or ARPA targets. You can sleep an acti-
vated target for easy view of radar images.
Sleeping target
To activate a target: Put the cursor on the target and press the ENTER key.
To sleep a target: Put the cursor on the target and press the CANCEL HL/OFF key.
4.5 AIS Target Data
You can show the AIS target data in the data box at the bottom of the screen. To dis-
play AIS target data, the menu item [Display] on the [AIS] menu must be set for [On]
and the menu item [Data Box] on the [Display] menu must be set for [Target] or [All].
1. Use the Cursorpad to put the cursor on an activated target.
2. Press the ENTER key to show the data of the target.
AIS target data
To remove the target data from a data box, put the cursor on its target symbol and
press the CANCEL/HL OFF key.
AIS target
selected for
data display
MMSI of vessel
Name of
vessel
(A)
000000026
Cursor
Data box
TRUE 05:00 <AIS> MMSI: 12345 NAME: PEGASUS
BRG
53.7°T
RNG 2.987NM COG
350.4°
SOG 23.45KN
CPA 1.65NM TCPA 06:14 LEN 100M BEAM 45M
Vector reference
Vector time
Bearing, range, course, speed
CPA, TCPA, Length, Beam of vessel
+
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4. AIS OPERATION
4-4
4.6 How to Sort Targets
You can sort the AIS targets received from the AIS transponder by range from your
ship, by sector, by CPA or TCPA.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [AIS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Sort By] and press the ENTER key.
Sort By options
4. Use the Cursorpad (S or T) to select sorting method and press the ENTER key.
[Range]: Sort targets within the display range set (see section 4.7), from nearest
to furthest.
[Sector]: Sort targets within the display sector set (see section 4.8) and within 24
nm, from nearest to furthest.
[CPA]: Sort targets within 24 nm by CPA, from closest to furthest.
[TCPA]: Sort targets within 24 nm by TCPA, from earliest time to latest time.
5. Press the MENU key to close the menu.
4.7 Display Range
You can set the AIS system to show only those AIS targets within the range you set.
The setting range is 0.1-36 nm for MODEL 1835, 0.1-48 nm for MODEL 1935, 0.1-64
nm for MODEL 1945. Actual range depends on the AIS Transponder. If the target sort-
ing method is selected to [Range], the target data within the range set here is trans-
mitted to this radar.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [AIS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Range] and press the ENTER key.
AIS-Range setting window (for MODEL 1835)
4. Use the Cursorpad (S or T) to set the display range and press the ENTER key.
5. Press the MENU key to close the menu.
Note: The unit of measurement for range is NM.
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4. AIS OPERATION
4-5
4.8 How to Display the Targets within a Specific Sec-
tor
You can display AIS targets only within a specific sector. If the target sorting method
is selected to [Sector], the target data within the sector set here is transmitted to this
radar.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [AIS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Sector Start] and press the ENTER key.
Sector Start setting window
4. Use the Cursorpad (S or T) to set the start point for the sector and press the EN-
TER key.
5. Use the Cursorpad (S or T) to select [Sector End] and press the ENTER key.
Sector End setting window
6. Use the Cursorpad (S or T) to set the end point for the sector and press the EN-
TER key.
7. Press the MENU key to close the menu.
4.9 Number of Targets to Display
You can select the maximum number of AIS targets to display. The setting value is 10
to 100. When the screen becomes cluttered with AIS targets, you can limit the number
of AIS targets to show. Targets are selected and displayed according to sort method.
(See section 4.6.)
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [AIS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Number of Targets] and press the ENTER
key.
Number of Targets setting window
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4. AIS OPERATION
4-6
4. Use the Cursorpad (S or T) to select the number of targets to display and press
the ENTER key.
5. Press the MENU key to close the menu.
4.10 Vector Attributes
4.10.1 What is a vector?
A vector is a line extending from a tracked target. A vector shows speed and course
of the target. The top of a vector shows estimated position of the target after the se-
lected vector time elapses. If you extend the vector length (time), you can evaluate the
risk of collision with any target.
4.10.2 Vector time and vector reference
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Vector Time] and press the ENTER key.
Vector Time setting window
4. Use the Cursorpad (S or T) to select time and press the ENTER key.
5. Use the Cursorpad (S or T) to select [Vector Reference] and press the ENTER
key.
Vector Reference options
6. Use the Cursorpad (S or T) to select [Relative] or [True] then press the ENTER
key. This function is not activate for [IEC] or [Russian-River] purpose. The mode
is set to [True].
[Relative]: Other ships’ vectors are displayed relative to your ship. This mode
helps find targets on a collision course. If a ship is on a collision course with your
ship, the vector of a ship points toward your ship position.
[True]: Your ship’s and other ships’ vectors are displayed at their true motions.
This mode helps discriminate between moving and stationary targets.
7. Press the MENU key to close the menu.
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4. AIS OPERATION
4-7
4.11 History Display (target past position)
This radar can display time-spaced dots (maximum ten dots) that marks the past po-
sitions of any tracked AIS target. You can evaluate actions of a target by the spacing
between dots. Below are examples of dot spacing and target movement.
Target movement and history display
You can select the number of history dots to display and the time interval to display
the history dots.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [History Dots] and press the ENTER key.
History Dots options
4. Use the Cursorpad (S or T) to select number of history dots to display (5 or 10)
or select [Off] to turn off the history display.
5. Press the ENTER key.
6. Use the Cursorpad (S or T) to select [History Interval] and press the ENTER key.
History Interval options
7. Use the Cursorpad (S or T) to select time interval and press the ENTER key.
8. Press the MENU key to close the menu.
(a) Ship turning
(b) Ship running
straight
(c) Ship reduced
speed
(d) Ship increased
speed
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4. AIS OPERATION
4-8
4.12 CPA/TCPA Alarm
Set CPA (Closest Point of Approach) alarm range and TCPA (predicted Time to CPA)
alarm time to alert you to targets that can be on a collision course. When CPA and
TCPA of any AIS target (including a sleeping target) become less than the preset CPA
and TCPA alarm settings, the audio alarm sounds. The alarm message "COLLISION"
appears. The target symbol changes to a dangerous target symbol (red) and flashes
with its vector. You can stop the audio alarm and flashing with any key. The dangerous
target symbol is displayed until the AIS target is not in the CPA and TCPA alarm set-
ting. The AIS continuously monitors CPA and TCPA of all AIS targets.
This feature helps identify targets that can be on a collision course.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [CPA] and press the ENTER key.
CPA options
4. Use the Cursorpad (S or T) to select CPA distance and press the ENTER key.
5. Use the Cursorpad (S or T) to select [TCPA] and press the ENTER key.
TCPA options
6. Use the Cursorpad (S or T) to select TCPA and press the ENTER key.
7. Press the MENU key to close the menu.
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4. AIS OPERATION
4-9
4.13 Proximity Alarm
The proximity alarm alerts you when an AIS target is within the range you set. The au-
dio alarm sounds and the alarm message "PROXIMITY" appears. The target symbol
changes to a dangerous target symbol (red) and flashes with its vector. Press any key
to stop the audio alarm and flashing. The dangerous target symbol is displayed until
the target is not within the range set, the alarm range is changed to exclude the target,
or the proximity alarm is deactivated.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Target] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Proximity] and press the ENTER key.
Proximity options
4. Use the Cursorpad (S or T) to select the range and press the ENTER key.
5. Press the MENU key to close the menu.
4.14 Lost Target
When AIS data is not received from a target at fixed interval (3-5* report intervals), the
target symbol changes to the lost target symbol (flashing). No audio or visual alarm is
given for a lost target.
Lost target symbol
* The interval at which AIS data is sent depends on speed of the AIS transponder. For
detailed information, refer to the Operator's Manual for the AIS transponder.
You can remove all lost AIS targets from the display as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [AIS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [ACK Lost Targets] and press the ENTER
key.
ACK Lost Targets options
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4. AIS OPERATION
4-10
4. Use the Cursorpad (S) to select [Yes] and press the ENTER key. All lost targets
symbols are erased from the screen and the long beep sounds.
5. Press the MENU key to close the menu.
4.15 Symbol Color
You can select the AIS symbol color among Green, Red (unavailable in the [IEC] or
[Russian-River] purpose), Blue, White or Black.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [AIS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Color] and press the ENTER key.
Color options
4. Use the Cursorpad (S or T) to select the color and press the ENTER key.
5. Press the MENU key to close the menu.
Note: Symbols can not be shown in the same color as the background color.
4.16 How to Ignore Slow Targets
You can prevent activation of the CPA/TCPA alarm against AIS targets that are trav-
eling at a speed lower than set here. The AIS symbols are not affected by this setting.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [AIS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Ignore Slow Targets] and press the ENTER
key.
Ignore Slow Targets setting window
4. Use the Cursorpad (S or T) to select speed (0.0 - 9.9 kn) and press the ENTER
key.
5. Press the MENU key to close the menu.
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5-1
5. GPS OPERATION
If the FURUNO GPS Navigator GP-320B is connected to this radar, you can set GP-
320B from this radar.
5.1 Navigator Mode
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [GPS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Mode] and press the ENTER key.
Mode options
4. Use the Cursorpad (S or T) to select [GPS] or [WAAS] then press the ENTER
key.
5. Press the MENU key to close the menu.
5.2 Datum
Select the type of datum which matches the paper charts you use for navigation. Se-
lect [WGS-84] if the radar is connected to an AIS Transponder.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [GPS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Datum] and press the ENTER key.
Datum options
4. Use the Cursorpad (S or T) to select the type of datum and press the ENTER
key. If you select [WGS-84] or [Tokyo], go to step 7. If you select [Other], go to the
next step.
5. Use the Cursorpad (S or T) to select [Datum No] and press the ENTER key.
Datum No setting window
6. Use the Cursorpad (S or T) to select the datum number and press the ENTER
key. (The setting range is 001 - 192 and 201 - 254. Refer to the appendix 2 “GEO-
DETIC CHART LIST”.)
7. Press the MENU key to close the menu.
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5. GPS OPERATION
5-2
5.3 WAAS Setup
Geostationary satellites, the type used with WAAS, provide more accurate position
data when compared to GPS. These satellites can be tracked automatically or manu-
ally. Auto tracking automatically searches for the best geostationary satellite from your
current position.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [GPS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [WAAS] and press the ENTER key.
WAAS options
4. Use the Cursorpad (S or T) to select [Auto] or [Manual] then press the ENTER
key. If you select [Auto], go to step 7. If you select [Manual], go to the next step.
5. Use the Cursorpad (S or T) to select [WAAS No] and press the ENTER key.
WAAS No setting window
6. Use the Cursorpad (S or T) to select WAAS number and press the ENTER key.
(The setting range is 120 - 158. Refer to the following table.)
7. Press the MENU key to close the menu.
Provider Satellite type Longitude Satellite No.
WAAS Inmarsat-3-F4 (AOR-W) 142°W 122
Inmarsat-3-F3 (POR) 178°E 134
Intelsat Galaxy XV 133°W 135
TeleSat Anik F1R 107.3°W 138
EGNOS Inmarsat-3-F2 (AOR-E) 15.5°W 120
Artemis 21.5°E 124
Inmarsat-3-F5 (IOR-W) 25°E 126
MSAS MTSAT-1R 140°E 129
MTSAT-2 145°E 137
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5. GPS OPERATION
5-3
5.4 Satellite Monitor
The Satellite Monitor provides the information about GPS and WAAS satellites. See
your GPS navigator's owner's manual for detailed information.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [GPS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Satellite Monitor] and press the ENTER
key.
Satellite monitor
4. Press the ENTER key to close only the satellite monitor display.
06
W3D
DOP
1.5
15m
13
Altitude
01GPS
WAAS
12
24
16
SNRSatellite No.
30 40 50
122
01
31
18
19
06
07
09
08
13
North marker
DOP (Dilution of Precision, 0.0 - 99.0)
SNR of tracked GPS satellites
Satellites whose SNR is above
40 are used to fix position.
GPS mode
2D, 3D,
W2D, W3D
GPS satellite no.*
WAAS satellite
Satellites in ring
have elevation
angle of 5°
Satellites in ring
have elevation
angle of 45°
Altitude of
GPS antenna
from sea
surface
SNR of tracked
WAAS satellite
W
N
[MENU]: Close MENU [ENTER]: Close this window
* Satellites used to fix
position are shown in red.
Satellite Monitor
01
09
24
12
19
18
07
13
16
08
31
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5. GPS OPERATION
5-4
5.5 Cold Start
Cold start, which clears the Almanac from the GPS receiver, can be necessary in the
following conditions:
If you have turned off the power of the GPS receiver for a long time.
The ship has moved far away from the previous fixing position (e.g., more than 500
km).
Other reason that prevents the receiver from finding its position within five minutes
after you turn on the power.
To do cold start, do the following:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [GPS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Cold Start] and press the ENTER key.
Cold Start options
4. Use the Cursorpad (S) to select [Yes] and press the ENTER key. After processing
cold start, the long beep sounds. (To stop cold start, press the CANCEL/HL OFF
key instead of the ENTER key.)
5. Press the MENU key to close the menu.
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6-1
6. MAINTENANCE, TROUBLE-
SHOOTING
This chapter has information about maintenance and troubleshooting that the user
can follow to care for the equipment.
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel can work
inside the equipment.
Turn off the power before you
service the antenna unit. Post
a warning sign near the power
switch not to turn on the power
while you service the antenna
unit.
Prevent the potential risk of being
struck by the rotating antenna and
exposure to RF radiation hazard.
When you work on the antenna
unit, wear a safety belt and hard
hat.
Serious injury or death can result
if a person falls from the radar
antenna mast.
NOTICE
Do not apply paint, anti-corrosive sealant
or contact spray to plastic parts or
equipment coating.
Those items contain products that can
damage plastic parts and equipment coating.
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6. MAINTENANCE, TROUBLESHOOTING
6-2
6.1 Preventive Maintenance
Regular maintenance helps keep your equipment in good condition and prevents fu-
ture problems. Check the items shown in the table below to help keep your equipment
in good condition for years to come.
Maintenance
Interval Item Check point Remedy
When
necessary
LCD Dust on the LCD Remove the dust from the LCD
with the tissue paper and an LCD
cleaner. To remove dirt or salt, use
the LCD cleaner. Change the tis-
sue paper often so as not to
scratch the LCD.
3 to 6
months
Ground terminal on
display unit
Check for tight connec-
tion and rust.
Tighten or replace as necessary.
Display unit
connectors
Check for tight connec-
tion.
Tighten if the connectors are loos-
ened.
Exposed nuts and
bolts on the anten-
na unit
Check for corroded or
loosened bolts.
Clean and repaint as necessary.
Use sealing compound instead of
paint.
Antenna radiator Check for dirt and cracks
on the radiator surface.
Clean radiator surface with fresh-
water-moistened cloth. Do not use
plastic solvents to clean.
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6. MAINTENANCE, TROUBLESHOOTING
6-3
6.2 Fuse Replacement
The fuse on the power cable protects the equipment from overcurrent and equipment
fault. If the fuse blows, find the cause before you replace the fuse. Use the correct
fuse. A wrong fuse can damage the equipment.
6.3 Magnetron Life
When the life of the magnetron is reached, the targets do not appear on the display.
If long-range performance appears to have decreased, contact a FURUNO agent or
dealer about replacement of the magnetron.
6.4 LCD Backlight Life
The life of the LCD backlight, which provides illumination for the LCD, is approximately
4,800 hours at 25°C (ambient temperature). The display brilliance cannot be raised
when the backlight has worn out. When brilliance cannot be raised, have a qualified
technician replace the backlight.
Unit Type Code No. Remarks
Display unit
(fitted on
power cable)
FGB0 125V 10A PBF 000-155-826-10 12 VDC
FGB0-A 125V 5A PBF 000-155-853-10 24 VDC
Model Magnetron type Code No. Estimated life
MODEL 1835
MODEL 1935
MAF1421B 000-158-786-10 Approx. 3,000 hours
MG4004 000-158-895-10 Approx. 3,000 hours
E3571 000-146-867-01 Approx. 2,000 hours
MODEL 1945
MAF1422B 000-158-788-10 Approx. 3,000 hours
MG4006 000-158-896-10 Approx. 3,000 hours
Name Type Code No.
Lamp holder complete set 104LHS46 000-160-949-10
WARNING
Use the correct fuse.
A wrong fuse can damage the equipment
and cause fire.
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6. MAINTENANCE, TROUBLESHOOTING
6-4
6.5 Simple Troubleshooting
This section provides simple troubleshooting procedures which the user can follow to
restore normal operation. If you cannot restore normal operation, do not check inside
the unit. Have a qualified technician check the equipment.
Simple troubleshooting
Problem Remedy
You cannot turn on the power. Check for blown fuse.
Check that the power connector is fastened.
Check for corrosion on the power cable con-
nector.
Check for damaged power cable.
Check battery for correct voltage output.
There is no response when a key is
pressed.
Turn off and on the power. If you do not get a
response, the key is damaged. Contact your
dealer for instructions.
The power is on and you operated the
STBY/TX key to transmit. The marks
and letters appear, but no echo ap-
pears.
Check that the antenna cable is fastened.
Tuning is correctly adjusted, but 
sensitivity is poor.
Replace the magnetron. Contact your dealer.
The range is changed, but radar pic-
ture does not change.
Try to hit the RANGE key again.
Turn off and on the display unit.
Poor discrimination in range because
of many echoes from the waves.
Adjust A/C SEA control.
The true motion presentation is not
working correctly.
Check that the setting of [Display Mode] in
the [Display] menu is set to [True Motion].
Check if the heading and position data are in-
put and correct.
The range rings are not displayed. Check that the setting of [Rings Brill] in the
[Brill/Color] menu is set to other than [Off].
Target is not tracked correctly be-
cause of sea clutter.
Adjust A/C SEA and A/C RAIN controls.
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6. MAINTENANCE, TROUBLESHOOTING
6-5
6.6 Advanced-level Troubleshooting
This section describes how to cure hardware and software troubles which the qualified
service persons must do.
Advanced-level troubleshooting
Problem
Probable cause or
check points
Remedy
Power cannot be
turned on.
1) Mains voltage/polarity
2) Power supply board
1) Correct the wiring and input
voltage.
2) Replace power supply
board.
Brilliance adjusted
but no picture.
1) SPU Board 1) Replace SPU board.
Antenna not rotat-
ing.
1) Antenna drive mechanism 1) Replace the antenna drive
mechanism.
Data and marks
not displayed in
transmit.
1) SPU board 1) Replace SPU board.
Set GAIN to maxi-
mum with A/C SEA
set at minimum.
Marks and indica-
tions appear but no
noise or echo.
1) Signal cable between an-
tenna and display unit
2) IF amplifier
3) Video amplifier board
1) Check continuity and isola-
tion of coaxial cable.
2) Replace IF amplifier.
3) Check coax line for fasten
connection. If connection is
good, replace SPU board.
Marks, indications
and noise appear
but no echo.
(Transmission leak
representing your
ship position is ab-
sent.)
1) Magnetron
2) Modulator board
3) SPU board
1) Check magnetron current.
2) Replace modulator board.
3) Replace SPU board.
Picture not updat-
ed or picture
freeze-up.
1) Bearing signal generator
2) SPU board
3) Video freeze-up
1) Check that signal cables
are fastened.
2) Replace SPU board.
3) Turn off and on the radar.
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6. MAINTENANCE, TROUBLESHOOTING
6-6
Radar is correctly
tuned but sensitivi-
ty is poor.
1) [2nd Echo Rejector] is [On]
2) Dirt on radiator face
3) Deteriorated magnetron
4) Detuned MIC
1) Turn off the [2nd Echo Re-
jector], from the [Echo]
menu.
2) Clean radiator.
3) Check the magnetron cur-
rent with the radar transmit-
ting on 48 nm range. If the
current is below normal,
magnetron may be defec-
tive. Replace the magne-
tron.
4) Check MIC detecting cur-
rent. If MIC detecting cur-
rent is below normal value,
MIC may have become de-
tuned.
Range changed
but radar picture
does not change.
1) RANGE key has faults
2) SPU board
3) Video freeze-up
1) Try to operate the RANGE
key. If you can not operate
the RANGE key, replace
the keypad.
2) Replace SPU board.
3) Turn off and on radar.
Range rings are
not displayed.
1) Adjust their brilliance on the
[Brill/Color] menu.
2) SPU Board
1) Replace associated circuit
board if unsuccessful.
2) Replace SPU Board.
Problem
Probable cause or
check points
Remedy
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6. MAINTENANCE, TROUBLESHOOTING
6-7
6.7 Diagnostic Test
The diagnostic test checks the system for correct operation. This test is for use by ser-
vice technicians, but the user can do this test to provide the service technician with
information.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Tests] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Self Test] and press the ENTER key.
Self Test screen
Test results
ROM, RAM: The results of the ROM and RAM test are displayed as OK or NG
(No Good).
NMEA1, NMEA2: The results of the ports NMEA1 and NMEA2 are displayed as
OK or "- -". Ports NMEA1 and NMEA2 require a special connector to test them.
When a special connector is not connected, "- -" is shown. If "- -" is displayed
with a special connector, contact your dealer for instruction.
APPLICATION VERSION, FPGA VERSION: The program numbers and pro-
gram version numbers (XX) are displayed.
XX: Program version no.
0359246-XX.XX
0359247-XX.XX
10.1
4.2
48.1
-40
3112
123.4
°
567
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Key, buzzer,
knob cotrol
and cursorpad
check
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6. MAINTENANCE, TROUBLESHOOTING
6-8
HEADING PULSE, BEARING PULSE: The results of the pulse input are dis-
played as OK or NG. When [Antenna Rotation] is set to [Stop], or [Watchman]
is set to [Off] in the STBY mode, this test is skipped and "- -" is shown for both
heading and bearing.
TUNING VOLTAGE, INDICATOR VOLTAGE, ANTENNA ROTATION, ECHO
LEVEL, TRIGGER FREQUENCY: The results of measurement are displayed.
GYRO: The current gyrocompass reading is displayed.
TEMPERATURE: The result of the temperature test is displayed as OK or NG
and the temperature is measured and shown.
TOTAL ON TIME, TOTAL TX TIME: The total number of hours, for which the
radar has been powered and transmitted, are displayed.
INPUT NMEA window: The condition of all the NMEA sentences being input to
this radar are displayed as OK or "- -". "- -" means no data input. Sentences are
updated every second.
Key check
Press each key one by one. A key’s on-screen location becomes green if the key
is normal.
Buzzer check
The F1 key tests on/off for the panel buzzer or external buzzer. To stop the buzz-
er, press the F1 key again.
Knob control check
Rotate each control knob. The four digits below the on-screen location for the
GAIN, A/C SEA and A/C RAIN knob controls show the control position. Press
each knob. The knob corresponding on-screen circle changes in green if the knob
is normal.
Cursorpad check
Press each arrow and diagonal dot one by one. The on-screen location changes
in green if the key is normal.
4. Press the MENU key three times to escape from the test.
5. Press the MENU key to close the menu.
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6. MAINTENANCE, TROUBLESHOOTING
6-9
6.8 LCD Test
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Tests] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [LCD Pattern] and press the ENTER key.
4. Press the MENU key several times to close the menu.
Note 1: You can cancel the test at any time when you press the CANCEL/HL OFF
key.
Note 2: You can adjust the screen brilliance with the key during the test.
Black
MENU
key
MENU
key
MENU
key
MENU
key
MENU
key
MENU
key
White Red
Green
Blue
Checker board design
7 tones of gray
B
R
I
L
L
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6. MAINTENANCE, TROUBLESHOOTING
6-10
6.9 ARPA Test
If the optional ARPA board is installed, its program number and test results (OK or NG)
are shown on the screen. [ARPA Test] menu item is inoperative with no ARPA board.
The radar must be transmitting to test ARPA function.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [Tests] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [ARPA Test] and press the ENTER key.
ARPA test
4. Press the MENU key three times to close the menu.
XX: Program version no.
[ ARPA TEST ]
ROM : OK
RAM
: OK
ARPA VERSION
: 18590271XX
SPEED : OK 12.3KN
COURSE
: OK 287.6
°
TRIGGER
: OK
VIDEO : OK
BEARING PULSE
: OK
HEADING PULSE : OK
MIN-HIT
: 0012
SCAN-TIME
: 0250
MANUAL-ACQ
: 03
AUTO-ACQ
: 05
FE-DATA1 : 0217
FE-DATA2 : 0023
ECHO NUMBER
[No. 1] 0123 [No. 2] 0321 [No. 3] 0084 [No. 4] 0234
[No. 5] 0110 [No. 6] 0219 [No. 7] 0073 [No. 8] 0145
[MENU] x 3 : Exit
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6. MAINTENANCE, TROUBLESHOOTING
6-11
6.10 GPS Test
You can check the FURUNO GPS receiver GP-320B interfaced with this radar for cor-
rect operation as follows:
1. Press the MENU key to open the menu.
2. Use the Cursorpad (S or T) to select [GPS] and press the ENTER key.
3. Use the Cursorpad (S or T) to select [Self Test] and press the ENTER key. The
program no. and result of the test are shown, as OK or NG (No Good). When NG
appears, check the GPS receiver.
GPS-Self Test screen
4. Press any key to close the test screen.
5. Press the MENU key to close the menu.
48502380XX
XX: Program version no. varies
according to equipment connected.
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6. MAINTENANCE, TROUBLESHOOTING
6-12
This page is intentionally left blank.
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AP-1
APPENDIX 1 MENU TREE
MENU key
Brill/Color
Display
Echo
Echo Brill (1 - 8)
Rings Brill (Off, 1, 2, 3, 4)
Mark Brill (1, 2, 3, 4)
HL Brill (1, 2, 3, 4)
Character Brill (1, 2, 3, 4)
View Position (Left, Left-Center, Center, Right-Center, Right)
Display Color (Day, Night, Twilight, Custom)
Echo Color (Yellow, Green, Orange, Multi)
Background Color (Black, DK Blue, Blue, White)
Character Color (Green, Red, White)
Echo Color Mode (System, Custom)
Custom Echo Color
Display Mode (Head Up, Course Up, North Up, True Motion, True View)
Zoom (Off, On)
Zoom Mode (Relative, True, Target)
Offcenter Mode (Manual, Custom, Auto)
Save Offcenter
Echo Area (Normal, Full Screen)
Base Text Display (Range, Mode, Alarm, Echo, EBL/VRM, +Cursor)
Data Box (Off, Nav, Target, All)
Gain/Sea/Rain Bar
STBY Display (Normal, Nav, Economy)
Gain Mode (Auto, Manual)
Sea Mode (Auto, Manual)
Rain Mode (Auto, Manual)
Auto Rain (Calm, Moderate, Rough)
A/C Auto (Off, On
)
Pulse Length (Short, Long)
Echo Stretch (Off, 1, 2, 3)
Echo Average (Off, 1, 2, Auto)
Noise Rejector (Off, On)
Wiper (Off, 1, 2)
Int Rejector (Off, 1, 2, 3)
Display-Dynamic (Narrow, Normal, Wide)
Display-Curve (1, 2, 3)
Color Erase (0 - 11)
2nd Echo Rejector (Off, On)
(Continued on next Page)
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APPENDIX 1 MENU TREE
AP-2
(Continued from previous page)
Custom 1
Custom 2
Custom 3
Alarm
Target
Trails
Tuning
Custom1 (Off, On)
Copy
Gain Mode (Auto, Manual)
Manual Gain (0 - 100)
Sea Mode (Auto, Manual)
Manual Sea (0 - 100)
Rain Mode (Auto, Manual)
Auto Rain (Calm, Moderate, Rough)
Manual Rain (0 - 100)
A/C Auto (Off, On)
Pulse Length (Short, Long)
Echo Stretch (Off, 1, 2, 3)
Echo Average (Off, 1, 2, Auto)
Noise Rejector (Off, On)
Wiper (Off, 1, 2)
Int Rejector (Off, 1, 2, 3)
Display-Dynamic (Narrow, Normal, Wide)
Display-Curve (1, 2, 3)
Color Erase (0 - 11)
Same as Custom 1
Same as Custom 1
Target Alarm 1 (In, Out)
Target Alarm 2 (In, Out)
Alarm Level (Low, Med, High)
Watchman (Off, 5min, 10min, 20min)
Panel Buzzer (Off, On)
External Buzzer (Off, On)
Alarm Status
Time (15s, 30s, 1min, 3min, 6min, 15min, 30min, Continuous)
Gradation (Single, Multi)
Color (Green, Red, Blue, White, Black)
Mode (Relative, True)
Level (1, 2, 3)
Restart (Off, On)
Narrow (Off, On)
Own Ship (Off, 1, 2)
All Cancel
Tuning Mode (Auto, Manual)
Manual Tuning (0.00V - 12.00V)
Tuning Init Adjust
(Continued on next page)
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APPENDIX 1 MENU TREE
AP-3
(Continued from previous page)
Others
Target
ARPA
AIS
GPS
F1 Setup
F2 Setup
F3 Setup
WPT Mark (Off, On)
EBL Reference (Relative, True)
VRM Unit (NM, KM, SM, KYD, NM&YD)
Cursor Position (Rng/Brg, Lat/Lon)
Vector Time (1min - 30min)
Vector Reference (Relative, True)
History Dots (Off, 5, 10)
History Interval (15s, 30s, 1min, 2min, 3min, 6min, 12min)
CPA (Off, 0.5NM, 1NM, 2NM, 3NM, 5NM, 6NM)
TCPA (30s, 1min, 2min, 3min, 4min, 5min, 6min, 12min)
Proximity (Off, 0.5NM, 1NM, 2NM, 3NM, 5NM, 6NM, 12NM, 24NM)
Display (Off, On)
Color (Green, Red, Blue, White, Black)
Auto Acquisition (Off, On)
ACK Lost Targets
All Cancel
Display (Off, On)
Color (Green, Red, Blue, White, Black)
Number of Targets (10 - 100)
Sort By (Range, Sector, CPA, TCPA)
Range (0.1NM - 36.0NM*)
Sector Start (0
°
- 359
°
)
Sector End (0
°
- 359
°
)
Ignore Slow Targets (0.0 - 9.9kn)
ACK Lost Targets
Mode (GPS, WAAS)
Datum (WGS-84, Tokyo, Other)
Datum No (001 -192, 201 - 254)
WAAS (Auto, Manual)
WAAS No (120 - 158)
Satellite Monitor
Self Test
Cold Start
(Continued on next page)
*: 36.0NM for MODEL 1835
48.0NM for MODEL 1935
64.0NM for MODEL 1945
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APPENDIX 1 MENU TREE
AP-4
(Continued from previous page)
System
Initial
Tests
Sector
Blanks
Units
Installation (For use by the installer. Not accessibile by user.)
Factory (For use by the installer. Not accessibile by user.)
Key Beep (Off, On)
Offcenter Speed (1kn - 99kn)
Compass Type (Magnetic, True)
Range Preset
Wind Direction (Apparent, True)
NMEA Port 1 (Auto, 4800bps, 38400bps)
NMEA Port 2 (Auto, 4800bps, 38400bps)
NMEA Mixing Out (Off, On)
Self Test
LCD Pattern
ARPA Test
Sect-Blank 1 Status (Off, On)
Sect-Blank 1 Start (0
°
- 359
°)
Sect-Blank 1 End (0
°
- 359
°)
Sect-Blank 2 Status (Off, On)
Sect-Blank 2 Start (0
°
- 359
°)
Sect-Blank 2 End (0
°
- 359
°)
Range Unit (NM, KM, SM)
Ship Speed Unit (kn, km/h, mph)
Depth Unit (m, ft, fa, pb, HR)
Temperature Unit (°C, °F)
Wind Speed Unit (kn, km/h, mph, m/s)
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AP-5
APPENDIX 2 GEODETIC CHART LIST
001: WGS84
002: WGS72
003: TOKYO
:
004: NORTH AMERICAN 1927
: Mean Value (CONUS)
005: EUROPEAN 1950
: Mean Value
006:
AUSTRALIAN GEODETIC 1984
: Australia & Tasmania
007: ADINDAN-MN
: Mean Value (Ethiopia & Sudan)
008: ADINDAN-E
: Ethiopia
009: ADINDAN-MA
: Mali
010: ADINDAN-SE
: Senegal
011: ADINDAN-SU
: Sudan
012: AFG
: Somalia
013: AIN EL ABD 1970
: Bahrain Is.
014: ANNA 1 ASTRO 1965
: Cocos Is.
015: ARC 1950-MN
: Mean Value
016: ARC 1950-B
: Botswana
017: ARC 1950-L
: Lesotho
018: ARC 1950-M
: Malawi
019: ARC 1950-S
: Swaziland
020: ARC 1950-ZR
: Zaire
021: ARC 1950-ZM
: Zambia
022: ARC 1950-ZB
: Zimbabwe
023: ARC 1960-MN
: Mean Value (Kenya & Tanzania)
024: ARC 1960-K
: Kenya
025: ARC 1960-T
: Tanzania
026: ASCENSION IS. 1958
: Ascension Is.
027: ASTRO BEACON “E”
: Iwo Jima Is.
028: ASTRO B4 SOR. ATOLL
: Tern Is.
029: ASTRO POS 71/4
: St. Helena Is.
030:
ASTRONOMIC STATION 1952
: Marcus Is.
031:
AUSTRALIAN GEODETIC 1966
: Australia & Tasmania
032: BELLEVUE (IGN)
: Efate & Erromango Is.
033: BERMUDA 1957
: Bermuda Is.
034: BOGOTA OBSERVATORY
: Columbia
035: CAMPO INCHAUSPE
: Argentina
036: CANTON IS. 1966
: Phoenix Is.
037: CAPE
: South Africa
038: CAPE CANAVERAL
:
039: CARTHAGE
: Tunisia
040: CHATHAM 1971
: Chatham Is. (New Zealand)
041: CHUA ASTRO
: Paraguay
042: CORREGO ALEGRE
: Brazil
043: DJAKARTA (BATAVIA)
: Sumatra Is. (Indonesia)
044: DOS 1968
: Gizo Is. (New Georgia Is.)
045: EASTER IS. 1967
: Easter Is.
046: EUROPEAN 1950-WE
: Western Europe
047: EUROPEAN 1950-CY
: Cyprus
048: EUROPEAN 1950-EG
: Egypt
049: EUROPEAN 1950-ESC
:
050: EUROPEAN 1950-EIS
:
051: EUROPEAN 1950-GR
: Greece
052 EUROPEAN 1950-IR
: Iran
053: EUROPEAN 1950-SA
: Italy, Sardinia
054: EUROPEAN 1950-SI
: Italy, Sicily
055: EUROPEAN 1950-NF
: Norway & Finland
056: EUROPEAN 1950-PS
: Portugal & Spain
057: EUROPEAN 1979
: Mean Value
058: GANDAJIKA BASE
: Republic of Maldives
059: GEODETIC DATUM 1949
: New Zealand
060: GUAM 1963
: Guam Is.
061: GUX 1 ASTRO
: Guadalcanal Is.
062: HJORSEY 1955
: Iceland
063: HONG KONG 1963
: Hong Kong
064: INDIAN-TV
: Thailand & Vietnam
065: INDIAN-BIN
: Bangladesh, India & Nepal
066: IRELAND 1965
: Ireland
067: ISTS 073 ASTRO 1969
: Diego Garcia
068: JOHNSTON IS. 1961
: Johnston Is.
069: KANDAWALA
: Sri Lanka
070: KERGUELEN IS.
: Kerguelen Is.
071: KERTAU 1948
: West Malaysia & Singapore
072: LA REUNION
: Mascarene Is.
073: L. C. 5 ASTRO
: Cayman Brac Is.
074: LIBERIA 1964
: Liberia
075: LUZON
: Philippines (excl. Mindanao Is.)
076: LUZON-M
: Mindanao Is.
077: MAHE 1971
: Mahe Is.
078: MARCO ASTRO
: Salvage Islands
079: MASSAWA
: Eritrea (Ethiopia)
080: MERCHICH
: Morocco
081: MIDWAY ASTRO 1961
: Midway Is.
082: MINNA
: Ni
geri
a
083: NAHRWAN-O
: Masirah Is. (Oman)
084: NAHRWAN-UAE
: United Arab Emirates
085: NAHRWAN-SA
: Saudi Arabia
086: NAMIBIA
: Namibia
087: MAPARIMA, BWI
: Trinidad & Tobago
088:
NORTH AMERICAN 1927WU
: Western United States
089:
NORTH AMERICAN 1927EU
: Eastern United States
090:
NORTH AMERICAN 192
7AK
: Alaska
091:
NORTH AMERICAN 1927BH
:
Bahamas (excl. San Salvador Is.)
Mean Value (Japan, Korea & Okinawa)
Mean Value (Florida & Bahama Is.)
England, Scotland, Channel & Shetland Is.
England, Ireland, Scotland & Shetland Is.
092: NORTH AMERICAN 1927SS : Bahamas, San Salvador Is.
093: NORTH AMERICAN 1927CN : Canada (incl. Newfoundland Is.)
094: NORTH AMERICAN 1927AB : Alberta & British Columbia
095: NORTH AMERICAN 1927EC : East Canada
096: NORTH AMERICAN 1927MO : Manitoba & Ontario
097: NORTH AMERICAN 1927NE :
098: NORTH AMERICAN 1927YK : Yukon
099: NORTH AMERICAN 1927CZ : Canal Zone
100: NORTH AMERICAN 1927CR : Caribbean
101: NORTH AMERICAN 1927CA : Central America
102: NORTH AMERICAN 1927CU : Cuba
103: NORTH AMERICAN 1927GR : Greenland
104: NORTH AMERICAN 1927MX : Mexico
105: NORTH AMERICAN 1983AK : Alaska
106: NORTH AMERICAN 1983CN : Canada
107: NORTH AMERICAN 1983CS : CONUS
108: NORTH AMERICAN 1983MX : Mexico, Central America
109: OBSERVATORIO 1966 : Corvo & Flores Is. (Azores)
110: OLD EGYPTIAN 1930 : Egypt
111: OLD HAWAIIAN-MN : Mean Value
112: OLD HAWAIIAN-HW : Hawaii
113: OLD HAWAIIAN-KA : Kauai
114: OLD HAWAIIAN-MA : Maui
115: OLD HAWAIIAN-OA : Oahu
116: OMAN : Oman
117:
ORDNANCE SURVEY OF GREAT BRITAIN 1936-NM
: Mean Value
118:
ORDNANCE SURVEY OF GREAT BRITAIN 1936-E
: England
119:
ORDNANCE SURVEY OF GREAT BRITAIN 1936-IM
: England, Isle
of Man & Wales
120:
ORDNANCE SURVEY OF GREAT BRITAIN 1936-SSI
: Scotland &
Shetland Is.
121:
ORDNANCE SURVEY OF GREAT BRITAIN 1936-WL
: Wales
122: PICO DE LAS NIVIES : Canary Is.
123: PITCAIRN ASTRO 1967 : Pitcairn Is.
124: PROVISIONS SOUTH CHILEAN 1963: South Chile (near 53°S)
125: PROVISIONAL SOUTH AMERICAN 1956MN: Mean Value
126: PROVISIONAL SOUTH AMERICAN 1956BO: Bolivia
127: PROVISIONAL SOUTH AMERICAN 1956NC: Chile-Northern Chile
(near 19°S)
128: PROVISIONAL SOUTH AMERICAN 1956SC: Chile-Southern Chile
(near 43°S)
129: PROVISIONAL SOUTH AMERICAN 1956CO: Columbia
130: PROVISIONAL SOUTH AMERICAN 1956EC: Ecuador
131: PROVISIONAL SOUTH AMERICAN 1956GY: Guyana
132: PROVISIONAL SOUTH AMERICAN 1956PR: Peru
133: PROVISIONAL SOUTH AMERICAN 1956VN: Venezuela
134: PUERTO RICO : Puerto Rico & Virgin Is.
135: QATAR NATIONAL : Qatar
136: QORNOQ : South Greenland
137: ROME 1940 : Sardinia Is.
138: SANTA BRAZ :
139: SANTO (DOS) : Espirito Santo Is.
140: SAPPER HILL 1943 : East Falkland Is.
141: SOUTH AMERICAN 1969MN : Mean Value
142: SOUTH AMERICAN 1969AG : Argentina
143: SOUTH AMERICAN 1969BO : Bolivia
144: SOUTH AMERICAN 1969BR : Brazil
145: SOUTH AMERICAN 1969CH : Chile
146: SOUTH AMERICAN 1969CO : Columbia
147: SOUTH AMERICAN 1969EC : Ecuador
148: SOUTH AMERICAN 1969GY : Guyana
149: SOUTH AMERICAN 1969PA : Paraguay
150: SOUTH AMERICAN 1969PR : Peru
151: SOUTH AMERICAN 1969TT : Trinidad & Tobago
152: SOUTH AMERICAN 1969VZ : Venezuela
153: SOUTH ASIA : Singapore
154: SOUTHEAST BASE : Porto Santo & Madeira Is.
155: SOUTHWEST BASE :
156: TIMBALAI 1948 :
157: TOKYO JP : Japan
158: TOKYO KP : Korea
159: TOKYO OK : Okinawa
160: TRISTAN ASTRO 1968 : Tristan da Cunha
161: VITI LEVU 1916 : Viti Levu Is. (Fiji Is.)
162: WAKE-ENIWETOK 1960 : Marshall Is.
163: ZANDERIJ : Surinam
164: BUKIT RIMPAH :
165: CAMP AREA ASTRO : Camp Mcmurdo Area, Antarctica
166: G. SEGARA : Kalimantan Is. (Indonesia)
167: HERAT NORTH : Afghanistan
168: HU-TZU-SHAN : Taiwan
169: TANANARIVE OBSERVATORY 1925 : Madagascar
170: YACARE : Uruguay
171: RT-90 : Sweden
172: TOKYO :
Mean Value (Japan, Korea & Okinawa)
173: AIN EL ABD 1970 : Bahrain Is.
Northwest Territories & Saskatchewan
Sao Miguel, Santa Maria Is. (Azores)
Faial, Graciosa, Pico, Sao Jorge & Terceria Is.
Brunei & East Malaysia (Sarawak & Sabah)
Bangka & Belitung Is. (Indonesia)
174:
175:
ARC 1960
ARS-A
: Mean Value (Kenya, Tanzania)
: Kenya
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APPENDIX 2 GEODETIC CHART LIST
AP-6
178: CAPE CANAVERAL
179: EASTER IS. 1967
180: EUROPEAN 1950
:
181: JHONSTON IS. 1961
: Jhonston Is.
182: NAHRWAN
: Saudi Arabia
183:
NAPARIMA, BWI
: Trinidad & Tobago
184: NORTH AMERICAN 1927
: Caribbeen
185: OLD HAWAIIAN
: Oahu
186: SAPPER HILL 1943
: East Falkland Is.
187: TIMBALAI 1948
:
Brunei & East Malaysia (Sarawak & Sabah)
188: TOKYO
: Japan
189: TOKYO
: South Korea
190: TOKYO
: Okinawa
191: WAKE-ENIWETOK 1960
: Marshall Is.
192: HU-TZU-SHAN
:
Taiwan
201: ADINDAN
: Burkina Faso
202: ADINDAN
: Cameroon
203: ARC 1950
: Burundi
204: AYABELLE LIGHTHOUSE
: Djibouti
205: BISSAU
: Guinea-Bissau
206: DABOLA
: Guinea
207: EUROPEAN 1950
: Tunisia
208: LEIGON
: Ghana
209: MINNA
: Cameroon
210: M’ PORALOKO
: Gebon
211: NORTH SAHARA 1959
: Algeria
212 POINT58
:
Mean Solution (Burkina Faso & Niger)
213: POINTE NOIRE 1948
: Congo
214: SIERRA LEONE 1960
: Sierra Leone
215:
VOIROL 1960
: Algeria
216:
AIN EL ABD 1970
: Saudi Arabia
217: INDIAN
: Bangladesh
218: INDIAN
: India & Nepal
219: INDIAN 1954
: Thailand
220: INDIAN 1960
: Vietnam (near 16N)
221: INDIAN 1960
:
Con Son Is. (Vietnam)
222: INDIAN 1975
: Thailand
223: INDONESIAN 1974
:
224:
CO-ORDINATE SYSTEM 1937 OF ESTONIA
: Estonia
225: EUROPEAN 1950
:
Malta
Portugal & Spain
Indonesia
226: EUROPEAN 1950 : Tunisia
227: S-42 (PULKOVO 1942) : Hungary
228: S-42 (PULKOVO 1942) : Poland
229: S-42 (PULKOVO 1942) : Czechoslovakia
230: S-42 (PULKOVO 1942) : Latvia
231: S-42 (PULKOVO 1942) :
232: S-42 (PULKOVO 1942) : Albania
233: S-42 (PULKOVO 1942) : Romenia
234: S-JTSK : Czechoslovakia
235: NORTH AMERICAN 1927 : East of 180W
236: NORTH AMERICAN 1927 : West of 180W
237: NORTH AMERICAN 1983 : Aleutian Is.
238: NORTH AMERICAN 1983 : Hawaii
239: SOUTH AMERICAN 1969 : Baltra, Galapagos Is.
240: ANTIGUA IS. ASTRO 1943 : Antigua, Leeward Is.
241: DECEPTION IS. : Deception Is., Antarctica
242: FORT THOMAS 1955 : Nevis, St. Kitts, Leeward Is.
243: ISTS 061 ASTRO 1968 : South Georgia Is.
244:
MONTSERRAT IS. ASTRO 1958
: Montserrat, Leeward Is.
245: FEUNION : Mascarene Is.
246: AMERICAN SAMOA 1962 : American Samoa Is.
247: INDONESIAN 1974 : Indonesia
248: KUSAIE ASTRO 1951 :
Caroline Is., Fed. States of Micronesia
249: WAKE Is. ASTRO 1952 : Wake Atoll
250: EUROPEAN 1950 :
Iraq, Israel, Jordan, Kuwait, Lebanon,
251:
HERMANNSKOGEL : Yugoslavia (Prior to 1990) Slovenia,
252:
INDIAN
: Pakistan
253: PULKOVO 1942 : Russia
254: VOIROL 1874 : Tunisia/Algeria
Kazakhstan
:
Easter Is.
:
Mean Value (Florida & Bahama Is.)
Saudi Arabia, and Syria
Croatia Bonsia and Herzegovina Serbia
176:
177:
ARS-B
ASCENSION IS. 1958
: Tanzania
: Ascension Is.
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FURUNO
MODEL 1835/1935/1945
SP - 1 E3579S01B-M
SPECIFICATIONS OF MARINE RADAR
MODEL 1835/1935/1945
1 GENERAL
1.1 Range scale, pulselength (PL) and Pulse repetition rate (PRR)
MODEL 1835
MODEL 1935
Range scale
(NM)
PL (μs)
PRR
(Hz approx.)
Range scale
(NM)
PL (μs)
PRR
(Hz approx.)
0.0625 to 1.6 0.08 2100 0.0625 to 1.6 0.08 2100
1.5 to 3.2 0.3 1200 1.5 to 3.2 0.3 1200
3 to 36 0.8 600
3 to 48 0.8 600
MODEL 1945
Range scale
(NM)
PL (μs)
PRR
(Hz approx.)
0.0625 to 1.6 0.08 2100
1.5 to 3.2 0.3 1200
3 to 64 0.8 600
1.2 Range discrimination 25 m
1.3 Minimum range 25 m
1.4 Bearing resolution MODEL 1835: 4°, MODEL 1935: 2.4°, MODEL 1945: 1.
1.5 Bearing accuracy ±1°
1.6 Range ring accuracy 0.9 of range in use or 8 m, whichever is greater
2 ANTENNA UNIT
2.1 Radiator type MODEL 1835: Printed array,
MODEL 1935/1945: Slotted waveguide array
2.2 Radiator length MODEL 1835: 60 cm, MODEL 1935: 100 cm,
MODEL 1945: 120 cm
2.3 Horizontal beamwidth MODEL 1835: 4.0°, MODEL 1935: 2.4°, MODEL 1945: 1.
2.4 Vertical beamwidth MODEL 1835: 20°, MODEL 1935/1945: 2
2.5 Sidelobe MODEL 1835: Within ±20° of main lobe: -18dB
Outside ±20° of main lobe: -23dB
MODEL 1935: Within ±20° of main lobe: -20dB
Outside ±20° of main lobe: -28dB
MODEL 1945: Within ±20° of main lobe: -24dB
Outside ±20° of main lobe: -30dB
2.6 Polarization Horizontal
2.7 Antenna rotation speed MODEL 1835: 24 rpm, MODEL 1935/1945: 24 rpm/48 rpm
2.8 Wind resistance MODEL 1935/1945: Relative wind speed 100 kn for 24 rpm/
70 kn for 48 rpm
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FURUNO
MODEL 1835/1935/1945
SP - 2 E3579S01B-M
3 TRANSCEIVER MODULE (CONTAINED IN ANTENNA UNIT)
3.1 Radiation type P0N
3.2 Frequency 9410 MHz±30MHz
3.3 Peak output power MODEL 1835/1935: 4 kW, MODEL 1945: 6 kW
3.4 Duplexer Circulator with diode limiter
3.5 Modulator switching FET
3.6 IF amplifier Log-amplifier
3.7 IF frequency 60 MHz
3.8 Tuning Automatic or manual
3.9 Warm-up time 90 s
4 DISPLAY UNIT
4.1 Screen type 10.4-inch color LCD, 640 (V) x 480 (H) dots, VGA
4.2 Effective radar diameter 158 mm
4.3 Range scales and Ring interval
Range
scale
(NM)
0.0625 0.125 0.25 0.5 0.75 1 1.5 1.6 2 3 3.2 4 6 8 12 16 24 32 36 48* 64**
Ring
interval
(NM)
0.03125 0.0625 0.125 0.125 0.25 0.25 0.5 0.4 0.5 1 0.8 1 2 2 3 4 6 8 12 12* 16**
Number
of rings
2 2 2 4 3 4 3 4 4 3 4 4 3 4 4 4 4 4 3 4* 4**
*: For MODEL 1935/1945, **: For MODEL 1945
4.4 Marks Heading line, Bearing scale, Range ring, Tuning indicator, Cursor,
North mark, Variable range marker (VRM), Electric bearing line
(EBL), Target alarm zone, Zoom window, Waypoint mark*
4.5 Alphanumeric indication Range, Range ring interval, Pulselength (SP/MP/LP), Display
mode (H UP/C UP/N UP/TM/TRUE VIEW), Off-centre (OFFCENT
(M/A/C)), Heading data*, Target trails, Tuning indicator, Target
alarms, Echo stretch (ES), Echo average (EAV), Electric bearing
line (EBL), Vector time*, Range and bearing to cursor or cursor
position*, Interference rejecter (IR), Auto anti-clutter (A/C Auto),
Variable range marker (VRM), Navigation data*(position, speed,
course), ARPA/AIS target data*
*: external data required
5 INTERFACE
5.1 Heading signal AD-10 format or NMEA0183
5.2 NMEA 2 ports, NMEA0183 Ver-1.5/2.0/3.0
5.3 Remote display/ Ext. buzzer 1 port (option)
5.4 USB 1 port, USB2.0 for maintenance
5.5 Input data sentences BWC, BWR, DBT, DPT, GGA, GLL, GNS, HDG, HDT, HDM, MTW,
MWV, RMB, RMC, VHW, VTG, VWR, VWT, XTE, ZDA
5.6 Output data sentences RSD, TLL, TTM
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FURUNO
MODEL 1835/1935/1945
SP - 3 E3579S01B-M
6 POWER SUPPLY
6.1 MODEL 1835 12-24 VDC: 4.1-2.0 A
6.2 MODEL 1935 12-24 VDC: 6.8-3.3 A for 24 rpm, 8.2-3.8 A for 48 rpm
6.3 MODEL 1945 12-24 VDC: 7.3-3.5 A for 24 rpm, 8.8-4.1 A for 48 rpm
6.4 Rectifier MODEL 1835: PR-62, option,
100/110/220/230 VAC, 1 phase, 50/60 Hz
MODEL 1935/1945: RU-3423, option,
100/110/115/220/230 VAC, 1 phase,
50/60 Hz
7 ENVIRONMENTAL CONDITION
7.1 Ambient temperature
Antenna unit -25°C to +55°C
Display unit -15°C to +55°C
7.2 Relative humidity 93% at 40°C
7.3 Degree of protection
Antenna unit IP26
Display unit IP55
7.4 Vibration IEC 60945
8 COATING COLOR
8.1 Antenna unit N9.5
8.2 Display unit N2.5
9 COMPASS SAFE DISTANCE
9.1 Antenna unit Standard: MODEL 1835: 0.90 m, MODEL 1935/1945: 1.00 m
Steering: MODEL 1835: 0.70 m, MODEL 1935/1945: 0.75 m
9.2 Display unit Standard: 0.45 m Steering: 0.30 m
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IN-1
INDEX
A
A/C RAIN control..................................... 1-12
A/C SEA control ...................................... 1-11
AIS
activating targets ..................................... 4-2
controls for .............................................. 4-1
display on/off ........................................... 4-1
display range........................................... 4-4
sleeping targets....................................... 4-2
sorting targets ......................................... 4-4
symbols ................................................... 4-2
target data ............................................... 4-3
Alarm message ....................................... 1-46
Anti-clutter ............................................... 1-13
ARPA
acquiring targets...................................... 3-2
controls for .............................................. 3-1
CPA/TCPA alarm .............................3-8
, 4-8
display on/off ........................................... 3-2
display sector .......................................... 4-5
history display ..................................3-6
, 4-7
lost target .......................................3-10
, 4-9
number of targets .................................... 4-5
precautions for use.................................. 3-1
proximity alarm.................................3-9
, 4-9
stopping tracking of targets ..................... 3-3
symbol color .................................3-10
, 4-10
target data ............................................... 3-7
test ........................................................ 6-10
vector ...............................................3-4
, 4-6
B
Background color .................................... 1-42
Brilliance.................................................. 1-35
C
CANCEL/HL OFF key ............................. 1-35
Characteristics curve............................... 1-45
Color selections....................................... 1-41
Controls..................................................... 1-1
Course-up mode ....................................... 1-8
CPA/TCPA alarm
AIS .......................................................... 4-8
ARPA ...................................................... 3-8
Cursor ..................................................... 1-14
CUSTOM key.......................................... 1-35
Custom setup
description............................................. 1-36
setting.................................................... 1-37
D
Depth unit................................................ 1-51
Display indications .................................... 1-3
Display mode
course-up ................................................ 1-8
head-up ................................................... 1-8
north-up................................................... 1-8
true motion .............................................. 1-9
true view.................................................. 1-9
Dynamic range........................................ 1-44
E
EBL
measuring bearing by............................ 1-18
reference ............................................... 1-19
EBL key................................................... 1-18
Echo area................................................ 1-48
Echo average .......................................... 1-29
Echo stretch ............................................ 1-29
F
F1, F2, F3 key......................................... 1-37
False echoes............................................. 2-3
Function keys.......................................... 1-37
Fuse replacement ..................................... 6-3
G
GAIN control............................................ 1-10
GPS
cold start.................................................. 5-4
datum ...................................................... 5-1
navigator mode ....................................... 5-1
satellite monitor ....................................... 5-3
test ........................................................ 6-11
WAAS...................................................... 5-2
H
Heading line ............................................ 1-35
Head-up mode .......................................... 1-8
History display
AIS .......................................................... 4-7
ARPA ...................................................... 3-6
I
Initial sub menu ....................................... 1-49
Interference rejector................................ 1-15
L
LCD backlight life ...................................... 6-3
Lost target
AIS .......................................................... 4-9
ARPA .................................................... 3-10
M
Magnetron life ........................................... 6-3
Maintenance
fuse replacement..................................... 6-3
LCD backlight life .................................... 6-3
magnetron life ......................................... 6-3
preventive................................................ 6-2
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INDEX
IN-2
Menu ..........................................................1-4
MENU key..................................................1-4
Multiple echoes ..........................................2-3
N
Navigation data
at screen bottom ....................................1-43
stand-by .................................................1-43
Noise rejector...........................................1-38
North-up mode ...........................................1-8
O
OFF CENTER key ...................................1-25
Off-centering the display..........................1-25
P
POWER/BRILL key............................ 1-2, 1-4
Proximity alarm
AIS ...........................................................4-9
ARPA .......................................................3-9
Pulselength ..............................................1-20
Q
Quick start..................................................1-2
R
RACON ......................................................2-8
Range and bearing between two targets .1-19
RANGE key..............................................1-10
Range measurement ...............................1-16
Range preset ...........................................1-49
Range ring brilliance ................................1-16
Range unit................................................1-51
Remote display ........................................1-56
S
SART .........................................................2-6
Second-trace echoes ...............................1-39
Sector blank.............................................1-52
Shadow sector ...........................................2-5
Ship speed unit ........................................1-51
Sidelobe echoes ........................................2-4
STBY/TX key .............................................1-2
System configuration .................................. xii
T
Target alarm
alarm type ..............................................1-23
deactivating.................................. 1-23
, 1-24
setting.....................................................1-22
stopping..................................................1-22
strength level..........................................1-24
TARGET ALARM key ..............................1-22
Target trails
color .......................................................1-32
gradation ................................................1-32
level........................................................1-33
mode ......................................................1-31
narrow trails............................................1-34
restarting ................................................1-33
starting ...................................................1-31
stopping..................................................1-31
trail copy.................................................1-33
your ship trail..........................................1-34
Temperature unit......................................1-51
Test
ARPA .....................................................6-10
diagnostic.................................................6-7
GPS........................................................6-11
LCD..........................................................6-9
TLL key ....................................................1-34
TRAILS key..............................................1-31
Troubleshooting
advanced-level.........................................6-5
simple.......................................................6-4
True motion mode......................................1-9
True view mode..........................................1-9
Tuning........................................................1-6
V
Virtual image ..............................................2-4
VRM
measuring range by ...............................1-17
unit of range measurement ....................1-17
VRM key ..................................................1-17
W
Watchman................................................1-40
Waypoint marker......................................1-46
Wind direction ..........................................1-51
Wind speed unit .......................................1-51
Wiper........................................................1-39
Z
Zoom........................................................1-27
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20

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