Garmin GNC 420W Pilot's Manual Addendum page 46

Appendix A
TAWS Alerts
Alert Type
TAWS System Failure
Terrain Inhibited
Terrain Not Available
Excessive Descent Rate (EDR) Caution
Excessive Descent Rate (EDR) Warning
Required Terrain Clearance (RTC) Caution
Required Terrain Clearance (RTC) Warning
Imminent Obstacle Impact (IOI) Caution
Imminent Terrain Impact (ITI) Warning
Required Obstacle Clearance (ROC)
Caution
Required Obstacle Clearance (ROC)
Warning
NOTE: TAWS Caution Alerts are displayed as constant black text on a yellow background; TAWS Warning Alerts are displayed as
constant white text on a red background.
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TAWS Alerts Summary
TAWS Page
Pop-Up Alert
Annunciation
None
None
None
or
or
or
or
or
or
Aural Message
"TAWS System Failure"
None
"Terrain Not Available"
"Sink Rate"
"Pull Up"
"Caution, Terrain; Caution, Terrain"
or
"Terrain Ahead; Terrain Ahead"
"Terrain, Terrain; Pull Up, Pull Up"
or
"Terrain Ahead, Pull Up; Terrain Ahead, Pull Up"
"Obstacle Ahead; Obstacle Ahead"
or
"Caution, Obstacle; Caution, Obstacle"
Terrain Ahead, Pull Up; Terrain Ahead, Pull Up"
or
"Terrain, Terrain; Pull Up, Pull Up"
"Caution, Obstacle; Caution, Obstacle"
or
"Obstacle Ahead; Obstacle Ahead"
"Obstacle, Obstacle; Pull Up, Pull Up"
or
"Obstacle Ahead, Pull Up; Obstacle Ahead, Pull
Up"