Marpa Targeting Symbols; Acquiring Marpa Targets Automatically; Removing Marpa Targets Automatically; Assigning A Marpa Tag To An Object - Garmin Volvo Penta GLASS COCKPIT 8x10 Owner's Manual

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.
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.

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.

Acquiring MARPA Targets Automatically

You can acquire MARPA targets automatically based on
MotionScope, guard zones, or boundaries.
1 From a radar screen, select Options > Layers > Other
Vessels > MARPA > Auto Acquire.
2 Select , and adjust additional settings (optional).

Removing MARPA Targets Automatically

You can enable the MARPA Auto Remove setting to
remove lost targets from the target list automatically.
While enabled, lost targets are removed when new targets
are acquired while the target list is at full capacity.
1 From a radar screen, select Options > Layers > Other
Vessels > MARPA.
2 Select Auto Remove > On.
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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.
1 From a radar screen, select an object or location.
2 Select Acquire Tgt. > MARPA Target.

Removing a MARPA Tag from a Targeted Object

1 From the Radar screen, select a MARPA target.
2 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.
1 From a radar screen, select a targeted object.
2 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.
1 From a Radar screen, select Options > Layers >
Other Vessels.
2 Select an option:
• To view a list of AIS threats, select AIS > AIS List.
• To view a list of MARPA threats, select MARPA >
MARPA List.
3 If necessary, select Display Options > Show, and
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.
1 From a Radar screen or the Radar overlay, select
Options > Layers > Other Vessels > AIS.
2 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
Radar