Garmin G950 Pilot's Manual page 357

TAWS-B 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 "TAWS System Failure" is generated
along with the 'TAWS FAIL' alert annunciation.
TAWS-B 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
'TAWS N/A' is generated in the annunciation window and on the TAWS-B Page. The voice alert "TAWS Not
Available" is generated.
Alert Type
System Test in progress
System Test pass
TAWS-B Alerting Inhibited
No GPS position
Excessively degraded GPS signal;
or Out of database coverage
area
TAWS-B System Test Fail; Terrain
or Obstacle database unavailable
or invalid; Invalid software
configuration; or System audio
fault
MFD Terrain or Obstacle
database unavailable or invalid,
and TAWS operating with PFD
Terrain or Obstacle databases.
† Annunciation is shown on TAWS-B Page and the Navigation Map Page when Terrain is enabled.
* "TAWS Available" will be heard when sufficient GPS signal is received, or Terrain database coverage area re-
entered.
190-00870-02 Rev. A
Figure 6-64 TAWS-B Page Menu
PFD/MFD* Alert TAWS-B Page Center Banner
Annunciation
None
NO GPS POSITION
TERRAIN DATABASE FAILURE
None
Table 6-16 TAWS-B System Status Annunciations
Garmin G950 Pilot's Guide for the Pilatus PC-6
HAZARD AVOIDANCE
Annunciation
TAWS TEST
None "TAWS System Test Test OK"
None
"TAWS Not Available"
None "TAWS Not Available"
TAWS FAIL
"TAWS System Failure"
Voice Alert
None
None
None
345