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Conguring the Chartplotter
GPSMAP 400/500 Series Owner’s Manual 51

To set a sonar alarm from the Home screen, select  > >
.
: You must be receiving NMEA sonar depth data or have a built-in sonar
with a temperature-capable transducer to view depth and water temperature
information.
—set an alarm to sound when the depth is less than the
specied value.
—set an alarm to sound when the depth is greater than the
specied value.
—set an alarm to sound when the transducer reports a
temperature that is 2°F (1.1°C) above or below the specied temperature.
—set an alarm to sound when the unit detects a suspended target of the
specied symbols.
—sounds an alarm for all sh sizes.
—sounds an alarm for medium and large sh only.
—sounds an alarm for large sh only.

You can congure your chartplotter to sound an alarm when the total amount
of remaining onboard fuel reaches the specied level.
: To receive fuel-level information, your unit must be connected to an
external fuel sensor, such as the Garmin GFS 10.


1. From the Home screen, select  >  >  > 
 >  (or ).
2. If you select , use the  to indicate the fuel level at which the
alarm should sound.

To congure settings for your boat, from the Home screen, select
 >.
—offset the surface reading for the depth of a keel, making it
possible to measure depth from the bottom of the keel instead of from the
transducer location. Enter a positive number to offset for a keel. Enter a
negative number to compensate for a large vessel that may draw several feet of
water.
57


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