Geonav 11C - Safety and Radar Features

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Anchor alarm
This function allows generating an anchor alarm message that
warns the user when the ship moves farther than the se-
lected distance from its anchoring position, that is the ship’s
position when the alarm is enabled. The reference distance
value for the alarm can also be set. After the alarm is issued,
press any key to reset it by using the current ship’s position
as the new anchor position. To set this function, press GOTO,
select SETUP and then ANCHOR ALARM.
ARPA
Your GEONAV allows displaying the position of targets tracked
by any radar featuring the ARPA (Automatic Radar Plotting
Aid) or MARPA (Mini-ARPA) function.
To activate the ARPA display function select ACTIVATE from
the GOTO, SETUP, ARPA menu. When the ARPA display func-
tion is active, the instrument shows the target data received
from the ARPA radar connected to the plotter through the
NMEA0183 port.
ARPA target representation
The figure below shows a sample of tracked ARPA targets.
The following graphic items are displayed:
1 - Target name
The name of the target being tracked.
2 - Vector
Shows the current direction of the target. The longer the vec-
tor, the faster the target.
3 - Marks
Each mark provides the forecasted position of the target - based
on its own current speed and direction - every minute.