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 specic temperature, or fallen
outside/inside a specic temperature range. Select Above or
Below and then enter a specic 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 specied
drift distance. Select On and then enter a specic distance.
Fish—set an alarm to sound when sh are detected with sonar.
Calendar Tab

Use the Calendar tab to plan trips, view sun and moon, and hunting

and shing 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