To set a persistent alarm:
1. Highlight the Alarms tab on the Main Menu.
2. Highlight the box next to the alarm you want to make
persistent (for example, Next Turn).
3. Press ENTER to place a check mark in the Persist box.
Navigation (Nav) Alarms
Next Turn—set an alarm to indicate the next turn in a route.
Select Dist to specify a distance before you reach the next turn
to sound the alarm. Select Time to specify a time before the turn
for the alarm to go off. Select Auto for the unit to provide a Next
Turn alarm at its discretion.
Arrival—set an alarm to sound when you are a specified
distance or time away from a destination waypoint. Select Auto
for the unit to provide an arrival alarm at its discretion.
Off Course—set an alarm to sound when off course. Select On,
and then enter a distance.
Anchor Drag—set an alarm to sound when you exceed a
specified drift distance. Select On, and then enter a distance.
Custom POI—set an alarm to sound when approaching a
custom POI.
System Alarms
Clock—set 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 278 must be on for the clock alarm to work.
Ext. (External) Voltage—set an alarm to sound when the
external voltage drops below a specified amount. Select On, and
then enter a specific voltage.
DGPS—set an alarm to sound when the GPSMAP 278 loses a
differential fix.
Anchor Drag—sets an alarm to sound when you exceed a
specified drift distance. Select On, and then enter a distance.
Accuracy—set an alarm to sound when GPS accuracy falls
outside of the user-set value. Select On, and then specify a
distance.
Sonar Alarms
Shallow Water/Deep Water—set an alarm to sound when you
enter an area of water that is too shallow or deep. Select On and
then specify a distance. You must be receiving sonar NMEA data
for this function to work.
Water Temp—set 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. You must be
receiving sonar NMEA data for this function to work.
Drift—set an alarm to sound when you exceeded a specified
drift distance. Select On and then enter a specific distance.
Fish—set an alarm to sound when fish are detected with sonar.
Calendar Tab
Use the Calendar tab to plan trips, view sun and moon, and hunting
and fishing information for the day.
Calendar Tab in Day View
Highlight an arrow and press ENTER to change the date in the view.
Sunrise and set
times for the
current location
and date.
List of points
and routes
added to this
date.
Calendar Options
The options menu is available in all three calendar views. Press
MENU to open the options menu. To view the Sun & Moon
Information or Hunt & Fish sub tab, highlight View Sun and Moon
or View Hunt and Fish and press ENTER.
GPSMAP 278 Owner’s Manual 73
MAIN MENU > CALENDAR TAB
