Garmin GPSMAP 278 - Manual (Page 81)

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 7
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