Garmin AERA 660 Pilot's Manual page 138

Appendix A
The following aural terrain alerts are issued when flight conditions meet
parameters that are set within the software algorithms, and are dependant on
the sensitivity level set in the Terrain Setup Menu.
Alert Terrain Obstacle Descent Rate
Severity
"caution, obstacle"
"caution, terrain"
Caution
"caution, sink rate"
"caution, obstacle
"caution, terrain ahead"
ahead"
"obstacle ahead! pull
"terrain ahead! pull up!"
up!" "sink rate, pull up!"
Warning
"terrain! terrain! pull up!
"obstacle! obstacle! "pull up!"
pull up!"
pull up! pull up!"
Aural Alerts
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Garmin aera 660 Pilot's Guide 190-02017-20 Rev. A