Garmin GPSMAP 478 Owner's Manual - Page 85

System Alarms, Weather Alarms, Clock, Ext. External Voltage, Accuracy, Tornado Warnings

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System Alarms 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 GPSMAP 378/478 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 GPSMAP 378/478 loses a differential fix. Accuracy-sets an alarm to sound when GPS accuracy falls outside of the user-set value. Select On, and then specify a distance. Main Menu > Alarms Tab Weather Alarms Tornado Warnings-sets an alarm to sound when you enter an area where a tornado warning is in effect. Thunderstorm Warnings-sets an alarm to sound when you enter an area where a severe thunderstorm warning is in effect. Flood Warnings-sets an alarm to sound when you enter an area where a flood warning is in effect. Flash Flood Warnings-sets an alarm to sound when you enter an area where a flash flood warning is in effect. Marine Warnings-sets an alarm to sound when you enter an area where a marine warning is in effect. GPSMAP 378/478 Owner's Manual 77

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System Alarms
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
GPSMAP 378/478 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 GPSMAP 378/478 loses a
differential fix.
Accuracy
—sets an alarm to sound when GPS accuracy falls outside
of the user-set value. Select
On
, and then specify a distance.
Weather Alarms
Tornado Warnings
—sets an alarm to sound when you enter an area
where a tornado warning is in effect.
Thunderstorm Warnings
—sets an alarm to sound when you enter
an area where a severe thunderstorm warning is in effect.
Flood Warnings
—sets an alarm to sound when you enter an area
where a flood warning is in effect.
Flash Flood Warnings
—sets an alarm to sound when you enter an
area where a flash flood warning is in effect.
Marine Warnings
—sets an alarm to sound when you enter an area
where a marine warning is in effect.
GPSMAP 378/478 Owner’s Manual
77
M
AIN
M
ENU
>
A
LARMS
T
AB