Htaws Failure Alert - Garmin GTN 625 Pilot's Manual

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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.

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.

190-01004-03 Rev. K

Garmin GTN 625/635/650 Pilot's Guide

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