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42 GPSMAP 400/500 Series Owner’s Manual
Conguring the Chartplotter
Setting System Alarms
To set a system alarm from the Home screen, select Congure >
Alarms > System.
Clock—set an alarm using the system (GPS) clock. The unit must
be on for the clock alarm to work.
Battery
—set an alarm to sound when the battery reaches a specied
low voltage.
GPS Accuracy
—set an alarm to sound when the GPS location
accuracy falls outside the specied value.
Setting Sonar Alarms
To set a sonar alarm from the Home screen, select Congure >
Alarms > Sonar.
NOTE: You must be receiving NMEA sonar depth data or using a
Garmin sounder module to congure sonar alarms.
Shallow Water—set an alarm to sound when the depth is less than
the specied value.
Deep Water
—set an alarm to sound when the depth is greater than
the specied value.
Water Temp—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.
Fish
—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.
Setting the Total Fuel Onboard Alarm
You can congure your chartplotter to sound an alarm when the total
amount of remaining onboard fuel reaches the specied level.
NOTE: To receive fuel-level information, your unit must be
connected to an external fuel sensor, such as the Garmin GFS 10.
To enable the Total Fuel Onboard alarm and set the fuel
alarm level:
1. From the Home screen, select Congure > Alarms > Fuel >
Total Onboard > On (or Off).
2. If you select On, use the Rocker to indicate the fuel level at
which the alarm should sound.
48


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