GPS 500 Pilot’s Guide and Reference
11-8
SECTION 11
TAWS
Excessive Descent Rate Alert
The purpose of the Excessive Descent Rate (EDR) alert is to provide suitable notication when the aircraft is deter-
mined to be closing (descending) upon terrain at an excessive speed. Figure 11-8 shows the parameters for the alert as
dened by TSO-C151b.
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
2000 4000 6000 8000 10000 12000
"PULL UP""PULL UP"
"SINK RA
TE"
Descent Rate (FPM)
Height Above Terrain (Feet)
Figure 11-8 Excessive Descent Rate Alert Criteria
190-00181-60 Rev. G
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