Garmin GNS 400W Pilot's Manual & Reference page 60

2 - NAV PAGES
Terrain Alerts
Annunciation
(FLASHING)
(FLASHING)
50
Pop-Up Alert
None
None
None TERRAIN not available due to degraded navigation solution
or the aircraft is outside of the database coverage area.
Terrain FLTA advisory generated by predicted or present
aircraft altitude being below minimum clearance values.
Unless there is a change in conditions a TERRAIN AHEAD
Terrain FLTA alert generated by predicted or present aircraft
(FLASHING)
Obstacle FLTA advisory generated by predicted or present
aircraft altitude being below minimum clearance values. Un-
less there is a change in conditions a OBSTACLE AHEAD alert
Obstacle FLTA alert generated by predicted or present aircraft
(FLASHING)
PDA alert when the aircraft is significantly below the normal
TERRAIN Alerts Summary
190-00356-00 Rev G
Description
TERRAIN has failed
TERRAIN has been inhibited
alert may be
generated.
altitude being below minimum clearance values.
may be generated.
altitude being below minimum clearance values.
approach path to the runway.