Garmin GPSMAP 546 - Configuring Other Vessels; AIS Alarm

Conguring the Chartplotter
GPSMAP 400/500 Series Owner’s Manual 53

To congure settings for boats other than your own, from the Home screen,
select  > .
: To congure AIS or DSC information for other boats, your unit must
be connected to an external AIS or DSC device.
—turn AIS (Automatic Identication System) on or off. AIS alerts you to
area trafc by providing boat IDs, position, course, and speed for boats that are
within range and equipped with a transponder.
—turn DSC (Digital Selective Calling) on or off.
—create a safe zone around your boat for collision avoidance. The
zone can be customized.

From the Home screen, select  > > .
• —change the measured radius of the safe-zone ring to a specied
distance from 500 ft. to 2.0 nm (or from 150 m to 3.0 km, or from 500
ft. to 2.0 mi).
• (Safe Zone)—sounds an alarm if AIS or MARPA determines
that a target will intersect the safe zone within the dened time interval
(from 1 to 24 minutes).
• —when  is selected, a message is displayed (“AIS:
Dangerous Target”) when a vessel enters the safe zone. When  is
selected, the message will not be displayed.