Htaws Page - Garmin GTN 625 Pilot's Manual

altitude of the aircraft. The GPS position and GSL altitude are used to calculate
and "predict" the aircraft' s flight path in relation to the surrounding terrain and
obstacles. In this manner, HTAWS can provide advanced alerts of predicted
dangerous terrain conditions. Detailed alert modes are described later in this
section.
10.4.2.2 Power Up
During power-up of the unit, the terrain/obstacle database versions are
displayed along with a disclaimer to the pilot. At the same time, HTAWS self-
test begins. HTAWS gives the following aural messages upon test completion:
• "HTAWS System Test, OK", if the system passes the test
• "HTAWS System Failure", if the system fails the test
A test failure is also annunciated visually for HTAWS, as shown in the HTAWS
Alert Summary table.
10.4.3

HTAWS Page

HTAWS is shown on the Terrain page when HTAWS is available.
360º View
HTAWS Legend
HTAWS Terrain
Colorization Overlay
Terrain information, aircraft ground track, and GPS-derived MSL altitude are
displayed on the page. The "GSL" above altitude display in the top right corner
of the display reminds the pilot that altitude is GPS-derived.
190-01004-03 Rev. F
Figure 10-18 Terrain/HTAWS Page
Garmin GTN 625/635/650 Pilot's Guide
Foreword
Getting
Started
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
Rotorcraft
Ownship
Weather
HTAWS
Annunciation
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
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