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GPSMAP 78 Series Owner’s Manual 37
Appendix
Radio
frequency/
protocol
2.4 GHz/ANT+ wireless
communications
protocol
GPS accuracy < 33 ft. (10 m) 95%
typical use
GPS is subject to
accuracy degradation
to 100 m 2DRMS under
the U.S. DoD imposed
Selective Availability
(SA) Program when
activated.
DGPS From 10 to 16 ft. (from
3 to 5 m) 95% typical
(WAAS accuracy in
North America)
Altimeter Accuracy: ± 10 ft.
(± 3 m)*
Resolution: 1 ft. (.3 m)
Range: from -2,000 ft.
to 30,000 ft.
(from -610 to 9144 m)
*Subject to proper user
calibration.
Compass Accuracy: ± 2 degrees
(± 5 degrees in extreme
Northern and Southern
latitudes)
*Resolution: 1 degree
*Subject to proper user
calibration.
Maximizing Battery Life
Using the Battery Save Option
Use the battery save option to save
battery power and prolong battery life.
From the main menu, select
> > > .
Decreasing the Backlight
Extensive use of screen backlighting
can signicantly reduce battery life.
You can adjust the backlight brightness
and decrease the backlight timeout to
maximize battery power.
1. Quickly press to open the
backlight status page.