Garmin GPSMAP 495 Owner's Manual page 110

Main Menu > Alarms Tab
System Alarms Sub Tab
System Alarms Sub Tab
Clock—sets an alarm based on the unit's clock. Select On, and then
enter a specific time that you want the alarm to sound. The unit must
be on for the clock alarm to work.
Ext. (External) Voltage—sets an alarm to sound when the external
voltage drops below a specified amount. Select On, and then enter a
specific voltage.
DGPS—sets an alarm to sound when the unit loses a differential fix.
Accuracy—sets an alarm to sound when GPS accuracy falls outside
of the user-set value. Select On, and then enter a specific distance.
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Sonar Alarms Sub Tab (Marine Mode Only)
You must be receiving sonar NMEA data for Sonar alarms to work.
Sonar Alarms Sub Tab
Shallow Water and Deep Water—sets an alarm to sound when you
enter an area of water that is too shallow or deep.
Water Temp—sets an alarm to indicate if the water temperature has
exceeded or dropped below a specific temperature, or fallen outside/
inside a specific temperature range. Select Above or Below and then
enter a specific temperature, or select Inside or Outside and enter a
range of temperatures.
Drift—sets an alarm to sound when you have exceeded a specified
drift distance. Select On, and then enter a specific distance.
Fish—sets alarm to sound when unit detects a fish of the specified
symbol size.
GPSMAP 495 Owner's Manual