Garmin G1000 Manual page 461

Terrain-SVS continually monitors several system-critical items such as database validity, hardware status, and
GPS status. If the terrain/obstacle database is not available, the voice alert "Terrain System Failure" occurs
with the 'TER FAIL' system status annunciation.
Terrain-SVS requires a 3-D GPS navigation solution along with specific vertical accuracy minimums. Should
the navigation solution become degraded or if the aircraft is out of the database coverage area, the annunciation
'TER N/A' appears on the PFD and on the Terrain-SVS Page. The voice alert "Terrain System Not Available" is
generated. When the GPS signal is re-established and the aircraft is within the database coverage area, the voice
alert "Terrain System Available" is generated.
Alert Cause
MFD Terrain or Obstacle
database unavailable
or invalid. Terrain-SVS
operating with PFD Terrain or
Obstacle databases
Terrain or Obstacle database
unavailable or invalid, invalid
software configuration, audio
fault
No GPS position
Excessively degraded GPS
signal
Out of database coverage
area
* Annunciation is displayed on the MFD when terrain display is enabled.
190-00709-05 Rev. D
PFD/MFD*
System Terrain-SVS Page Center Banner
Status
Annunciation
None
TERRAIN DATABASE FAILURE
NO GPS POSITION
Table 6-19 Terrain-SVS Status Annunciations
Garmin G1000 Pilot's Guide for the Socata TBM 850/900
Annunciation
TERRAIN FAIL
None
None
HAZARD AVOIDANCE
Voice Alert
None
"Terrain System Failure"
"Terrain System Not Available"
"Terrain System Available" when
GPS position returns
"Terrain System Not Available"
"Terrain System Available" when
sufficient GPS signal is received
"Terrain System Not Available"
"Terrain System Available" when
aircraft re-enters coverage area
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