Garmin GDL 69A GPS Receiver User Manual


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Part Three: Section 3
TAWS Alerts
“Five-Hundred” Aural Alert
The purpose of the aural alert message “Five-Hun-
dred” is to provide an advisory alert to the pilot that
the aircraft is five-hundred feet above terrain. When
theaircraftdescendswithin500feetofterrain,the
aural message “Five-hundred” is generated. There are no
display annunciations or pop-up alerts that accompany
the aural message.
TAWS Not Available Alert
GarminTAWSrequiresa3-DGPSnavigationsolu-
tion along with specific vertical accuracy minimums.
Should the navigation solution become degraded, or if
the aircraft is out of the database coverage area, the an-
nunciation“TERN/A”isgeneratedintheannunciation
window. When the GPS signal is re-established and the
aircraftiswithinthedatabasecoveragearea,the“TER
N/A”annunciationisremoved.
“TERRAIN NOT AVAILABLE” Display
TAWS Failure Alert
TAWS continually monitors several system-critical
items, such as database validity, hardware status, and
GPS status. If the terrain/obstacle database is not avail-
able, the aural message “TAWS System Failure” is issued
alongwiththe“TERFAIL”annunciation.
Figure 13-11: TAWS FAILED Display
TAWS Alert Summary
The aural alert voice gender is configurable to be
either male or female. Also, there are different alert
textphrasesavailableforseveralofthealerts,asshown
below. See your Garmin installer for further informa-
tion on configuring the alert system.
190-00356-30 Rev C
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