Marpa Targets - Lowrance HDS Carbon Quick Start Manual

140
- C: Range, relative to vessel center
- D: Width
5.
Select the save option in the menu to save your settings.
When positioned, you can turn the guard zones on/off by selecting
the relevant section on the data bar.
A
C
Shape: Sector
Alarm settings
An alarm is activated when a radar target breaches the guard zone
limits. You can select if the alarm is activated when the target enters
or exits the zone.
Sensitivity
The guard zone sensitivity can be adjusted to eliminate alarms for
small targets.

MARPA targets

If the system includes a heading sensor, the MARPA function (Mini
Automatic Radar Plotting Aid) can be used to track up to ten radar
targets.
You can set alarms to notify you if a target gets too close. Refer to
"Radar settings" on page 143.
MARPA tracking is an important tool for collision avoidance.
Ú Note:
MARPA requires heading data for both the radar and the
HDS Carbon.
MARPA target symbols
The system uses the target symbols shown below.
Radar | HDS Carbon Operator Manual
D
B
C
B
Shape: Circle