400/500 Series Garmin Optional Displays
400/500 Series Garmin Optional Displays
400/500 Series Garmin Optional Displays
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60<br />
Section 3<br />
TAWS Alerts<br />
Excessive Descent Rate Severity Levels<br />
CAUTION—The annunciation and pop-up terrain alert<br />
are accompanied by the aural message “Sink Rate”.<br />
WARNING—The annunciation and pop-up terrain alert<br />
are accompanied by the aural message “Pull Up”.<br />
Excessive Descent Rate Alert (EDR)<br />
The purpose of the Excessive Descent Rate alert is to provide suitable alerts when the aircraft is determined<br />
to be closing (descending) upon terrain at an excessive speed. Figure 3-4 shows the parameters for<br />
the alert as defined by TSO-C151b.<br />
Height Above Terrain (Feet)<br />
<strong>500</strong>0<br />
4<strong>500</strong><br />
<strong>400</strong>0<br />
3<strong>500</strong><br />
3000<br />
2<strong>500</strong><br />
2000<br />
1<strong>500</strong><br />
1000<br />
<strong>500</strong><br />
0<br />
"SINK RATE"<br />
"PULL "PULL UP"<br />
2000 <strong>400</strong>0 6000 8000 10000 12000<br />
Descent Rate (FPM)<br />
Figure 3-4 Excessive Descent Rate Graph
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