Garmin Aera 660 Pilot's Manual page 170

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
Severity
"caution, terrain"
Caution
"caution, terrain ahead"
"terrain ahead! pull up!"
Warning
"terrain! terrain! pull up!
pull up!"
154
Obstacle
"caution, obstacle"
"caution, obstacle
ahead"
"obstacle ahead! pull
up!"
"obstacle! obstacle!
pull up! pull up!"
Aural Alerts
Garmin aera 660 Pilot's Guide
Descent Rate
"caution, sink rate"
"sink rate, pull up!"
"pull up!"
190-02017-20 Rev. E