Bedienungsanleitung Garmin GPSMAP 8600 serie (Seite 34 von 64) (Englisch)

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target. The radar system automatically tracks the tagged object

and provides you with information about the object, including the

range, bearing, speed, GPS heading, nearest approach, and

time to nearest approach. MARPA indicates the status of each

tagged object (acquiring, lost, tracking, or dangerous), and the

chartplotter can sound a collision alarm if the object enters your

safe zone.

MARPA Targeting Symbols

Acquiring a target. Concentric, dashed green rings radiate from

the target while the radar is locking onto it.

Target has been acquired. A solid green ring indicates the

location of a target that the radar has locked onto. A dashed

green line attached to the circle indicates the projected course

over ground or the GPS heading of the target.

Dangerous target is in range. A red ring flashes from the target

while an alarm sounds and a message banner appears. After

the alarm has been acknowledged, a solid red dot with a dashed

red line attached to it indicates the location and the projected

course over ground or the GPS heading of the target. If the safe-

zone collision alarm has been set to Off, the target flashes, but

the audible alarm does not sound and the alarm banner does

not appear.

Target has been lost. A solid green ring with an X through it

indicates that the radar could not lock onto the target.

Closest point of approach and time to closest point of approach

to a dangerous target.

Assigning a MARPA Tag to an Object

Before you can use MARPA, you must have a heading sensor

connected and an active GPS signal. The heading sensor must

provide the

NMEA 2000 parameter group number (PGN)

127250 or the NMEA 0183 HDM or HDG output sentence.

From a radar screen, select an object or location.

Select Acquire Target

> MARPA Target

Removing a MARPA Tag from a Targeted Object

From the Radar screen, select a MARPA target.

Select MARPA Target

> Remove

Viewing Information about a MARPA-tagged Object

You can view the range, bearing, speed, and other information

about a MARPA-tagged object.

From a radar screen, select a targeted object.

Select

MARPA Target.

Viewing a List of AIS and MARPA Threats

From any Radar screen or the Radar overlay, you can view and

customize the appearance of a list of AIS and MARPA threats.

From a Radar screen, select Menu > Other Vessels > List >

Show.

Select the type of threats to include in the list.

Showing AIS Vessels on the Radar Screen

AIS requires the use of an external AIS device and active

transponder signals from other vessels.

You can configure how other vessels appear on the Radar

screen. If any setting (except the AIS display range) is

configured for one radar mode, the setting is applied to every

other radar mode. The details and projected heading settings

configured for one radar mode are applied to every other radar

mode and to the Radar overlay.

From a Radar screen or the Radar overlay, select Menu >

Other Vessels >

Display Setup

Select an option:

• To indicate the distance from your location within which

AIS vessels appear, select Display Range, and select a

distance.

• To show details about AIS-activated vessels, select

Details

> Show

• To set the projected heading time for AIS-activated

vessels, select Proj. Heading, and enter the time.

• To show the tracks of AIS vessels, select Trails, and

select the length of the track that appears.

VRM and EBL

The variable range marker (VRM) and the electronic bearing line

(EBL) measure the distance and bearing from your boat to a

target object. On the Radar screen, the VRM appears as a circle

that is centered on the present location of your boat, and the

EBL appears as a line that begins at the present location of your

boat and intersects the VRM. The point of intersection is the

target of the VRM and the EBL.

Showing the VRM and the EBL

From a radar screen, select Menu > Radar Options > Show

VRM/EBL.

Adjusting the VRM and the EBL

Before you can adjust the VRM and the EBL, you must show

them on the Radar screen (Showing the VRM and the EBL,

page 26).

You can adjust the diameter of the VRM and the angle of the

EBL, which moves the intersection point of the VRM and the

EBL. The VRM and the EBL configured for one mode are

applied to all other radar modes.

From a Radar screen, select a new location for the

intersection point of the VRM and the EBL.

Select Drop VRM/EBL.

Select

Stop Pointing.

Measuring the Range and Bearing to a Target Object

Before you can adjust the VRM and the EBL, you must show

them on the Radar screen (Showing the VRM and the EBL,

page 26).

From a Radar screen, select the target location.

Select

Measure Distance.

The range and the bearing to the target location appear in the

upper-left corner of the screen.

Radar Overlay

When you connect your chartplotter to an optional Garmin

marine radar, you can use overlay radar information on the

Navigation chart or on the Fishing chart.

Data appears on the radar overlay based on the most recently

used radar mode and all settings configurations applied to the

radar overlay are also applied to the last-used radar mode.

Radar Overlay and Chart Data Alignment

When using the Radar overlay, the chartplotter aligns radar data

with chart data based on the boat heading, which is based by

default on data from a magnetic heading sensor connected

using a

NMEA 0183 or NMEA 2000 network. If a heading sensor

is not available, the boat heading is based on GPS tracking

data.

GPS tracking data indicates the direction in which the boat is

moving, not the direction in which the boat is pointing. If the boat

is drifting backward or sideways due to a current or wind, the

Radar overlay may not perfectly align with the chart data. This

situation should be avoided by using boat-heading data from an

electronic compass.

If the boat heading is based on data from a magnetic heading

sensor or an automatic pilot, the heading data could be

compromised due to incorrect setup, mechanical malfunction,

magnetic interference, or other factors. If the heading data is

compromised, the Radar overlay may not align perfectly with the

chart data.

26 Radar

Garmin GPSMAP 8600 serie Seite 34

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