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10-49
190-01004-03 Rev. P
GTN 625/635/650 Pilot’s Guide
Terrain
HTAWS
Annunciation
Pop-Up Alert
Aural Message
Description
“Caution - Obstacle,
Obstacle”
Forward Looking
Terrain Avoidance
Caution for
Obstacle
“Warning - Obstacle,
Obstacle”
Forward Looking
Terrain Avoidance
Warning for
Obstacle
None
None
Alerting
thresholds
are reduced.
Visual and aural
annunciation of
caution alerts
are suppressed.
“Wire Ahead”
Forward Looking
Terrain Avoidance
Caution for Wire.
"Wire Ahead Pull Up, Wire
Ahead Pull Up"
Forward Looking
Terrain Avoidance
Warning for
Power Lines.
None
None
“Five Hundred”
“Four Hundred”
“Three Hundred”
“Two Hundred”
“One Hundred”
"Fifty"
HTAWS provides
optional 500 ft
through 100 ft (in
100 ft increments)
altitude call
out alerts. An
additional value of
50 ft is available if
a radar altimeter
is installed.
Table 10-21
HTAWS Alert Summary
NOTE:
HTAWS Caution Alerts are displayed as constant black text on a
yellow background; HTAWS Warning Alerts are displayed as constant white
text on a red background.
Summary of Contents for GTN 625
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