Lowrance HDS-7 Carbon Operators Manual EN - Page 140

Alarm settings, Sensitivity, MARPA targets, MARPA target symbols

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- 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. D CA B C B Shape: Sector Shape: Circle 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. 140 Radar | HDS Carbon Operator Manual

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-
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.
C
B
A
D
Shape: Sector
B
C
Shape: Circle
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.
140
Radar
| HDS Carbon Operator Manual