Garmin GTN 725 Cockpit Reference Manual page 88

Message
GPS
NAVIGATION
LOST -
Erroneous
position. Use other
navigation source.
GPS
NAVIGATION
LOST -
Insufficient
satellites. Use other
navigation source.
GPS RECEIVER -
GPS receiver has
failed. Check GPS
coax for electrical
short.
GPS RECEIVER -
GPS receiver needs
service.
GPS RECEIVER -
Low internal clock
battery.
78
Description
GPS position has been lost
due to erroneous position.
GPS position has been lost
due to lack of satellites.
Internal communication
to the SBAS board is
inoperative.
The GPS module is
reporting that it needs
service. The GPS module
may continue to function.
The GPS module indicates
that its clock battery is low.
Almanac data may have
been lost. The unit will
function normally, but may
take a longer than normal
period to acquire a GPS
position.
GTN 725/750 Cockpit Reference Guide
Action
Use a different GPS receiver or a
non-GPS based source of navigation.
Contact dealer for service.
Wait for GPS satellite geometry to
improve. Ensure the aircraft has a clear
view of the sky. Use a different GPS
receiver or a
non-GPS based source of navigation.
Contact dealer for service.
Use a different GPS receiver or a
non-GPS based source of navigation.
Contact dealer for service.
Use a different GPS receiver or a
non-GPS based source of navigation.
Contact dealer for service.
Contact dealer for service.
190-01007-04 Rev. L