Bedienungsanleitung Garmin VOLVO PENTA GLASS COCKPIT Gpsmap 722 (Seite 42 von 74) (Englisch)

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color schemes, green indicates the target is moving away from

you and red indicates the target is moving toward you.

On some models, you can also adjust the M-Scope Sensitivity

setting to change the speed threshold for target highlighting. A

higher setting highlights slower targets, and a lower setting

highlights only faster targets.

Enabling a Guard Zone

You can enable a guard zone to alert you when anything comes

within a specified area around your boat.

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

Zone.

Defining a Circular Guard Zone

Before you can define the boundaries of the guard zone, you

must enable a guard zone (Enabling a Guard Zone, page 34).

You can define a circular guard zone that completely surrounds

your boat.

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

Zone > > Circle.

Select the location of the outer guard zone circle.

Select the location of the inner guard zone circle to define the

width of the guard zone.

Defining a Partial Guard Zone

Before you can define the boundaries of the guard zone, you

must enable a guard zone (Enabling a Guard Zone, page 34).

You can define the boundaries of a guard zone that does not

completely surround your boat.

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

Zone > > Corner 1.

Touch and drag the location of the outer guard-zone corner

Select Corner 2.

Select the location of the inner guard-zone corner to

define the width of the guard zone.

Select Done.

MARPA

Mini-automatic radar plotting aid (MARPA) enables you to

identify and track targets and is primarily used for collision

avoidance. To use MARPA, you assign a MARPA tag to a

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 Tgt. > 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 > Layers > 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 > AIS.

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.

34 Radar

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