Alert Type
PFD/MFD
Alert
Annunciation
MFD Pop-Up Alert Aural Message
Excessive Descent
Rate Warning
(EDR)
“Pull Up”
Reduced Required
Terrain Clearance
Warning (RTC)
*
or
“Terrain Ahead, Pull Up; Terrain
Ahead, Pull Up” *
or
“Terrain, Terrain; Pull Up, Pull Up”
Imminent Terrain
Impact Warning
(ITI)
*
or
“Terrain Ahead, Pull Up; Terrain
Ahead, Pull Up” *
or
“Terrain, Terrain; Pull Up, Pull Up”
Reduced
Required Obstacle
Clearance Warning
(ROC)
*
or
“Obstacle Ahead, Pull Up; Obstacle
Ahead, Pull Up” *
or
“Obstacle, Obstacle; Pull Up, Pull Up”
Imminent Obstacle
Impact Warning
(IOI)
*
or
“Obstacle Ahead, Pull Up; Obstacle
Ahead, Pull Up” *
or
“Obstacle, Obstacle; Pull Up, Pull Up”
Reduced Required
Terrain Clearance
Caution (RTC)
*
or
“Terrain Ahead; Terrain Ahead” *
or
“Caution, Terrain; Caution, Terrain”
Imminent Terrain
Impact Caution
(ITI)
*
or
“Terrain Ahead; Terrain Ahead” *
or
“Caution, Terrain; Caution, Terrain”
Reduced
Required Obstacle
Clearance Caution
(ROC)
*
or
“Obstacle Ahead; Obstacle Ahead” *
or
“Caution, Obstacle; Caution,
Obstacle”
Imminent Obstacle
Impact Caution
(IOI)
*
or
“Obstacle Ahead; Obstacle Ahead” *
or
“Caution, Obstacle; Caution,
Obstacle”
Premature Descent
Alert Caution
(PDA)
“Too Low, Terrain”
Altitude Callout
“500”
None None “Five-Hundred”
Excessive Descent
Rate Caution
(EDR)
“Sink Rate”
Negative Climb
Rate Caution
(NCR)
*
or
“Don’t Sink” *
or
“Too Low, Terrain”
* Alerts with multiple messages are congurable at installation and are installation-dependent.
Alerts for the default conguration are indicated with asterisks.
Figure 7-93 – TAWS Alerts
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