11-37
190-01007-03 Rev. D
Garmin GTN 725/750 Pilot’s Guide
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
11.4.15 HTAWS Not Available Alert
Garmin HTAWS 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 “HTAWS
N/A” is shown in the annunciation window. When the GPS signal is re-
established and the aircraft is within the database coverage area, the “HTAWS
N/A” annunciation is removed.
11.4.16 HTAWS Failure Alert
HTAWS continually monitors several system-critical items, such as database
validity, hardware status, and GPS status. If the terrain/obstacle database is not
available, the aural message
“HTAWS System Failure”
is issued along with the
“HTAWS FAIL” annunciation.
11.4.17 HTAWS Alert Summary
The aural alert voice gender is configurable to be either male or female. See
your Garmin installer for further information on configuring the alert system.
HTAWS
Annunciation
Pop-Up Alert
Aural Message
Description
None
“HTAWS System Failure”
HTAWS has failed
None
None
HTAWS has been
inhibited by the
crew, or the
aircraft ground-
speed is below 30
knots (automatic
inhibiting).
None
“HTAWS Not Available”
HTAWS not
available.
“Caution - Terrain, Terrain”
Forward Looking
Terrain Avoidance
Caution for
Terrain
“Warning - Terrain, Terrain”
Forward Looking
Terrain Avoidance
Warning for
Terrain
Summary of Contents for GTN 725
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