Configuring the Chartplotter

AIS Alarm—create a safe zone around your boat for collision avoidance. The zone can be customized.

To customize safe-zone settings:

From the Home screen, select Configure > Other Vessels > AIS

Alarm.

Range—change the measured radius of the safe-zone ring to a specified distance from 500 ft. to 2.0 nm (or from 150 m to

3.0 km, or from 500 ft. to 2.0 mi).

Time to (Safe Zone)—sounds an alarm if AIS or MARPA determines that a target will intersect the safe zone within the defined time interval (from 1 to 24 minutes).

AIS Alarm—when On is selected, a message is displayed (“AIS: Dangerous Target”) when a vessel enters the safe zone. When Off is selected, the message will not be displayed.

GPSMAP 400/500 Series Owner’s Manual

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