Garmin G900X Pilot's Manual page 468

HAZARD AVOIDANCE
accompanied by a potential impact point displayed on the TAWS-B Page. The alert is annunciated when the
projected vertical flight path is calculated to come within minimum clearance altitudes in Figure 6-151.
800
700
600
500
400
300
200
100
0
The system automatically disables FLTA alerts when the aircraft is less than 200 feet above the destination
runway elevation while within 0.5 nm of the approach runway or the aircraft is between runway ends.
PREMATURE DESCENT ALERTING
A Premature Descent Alert (PDA) is issued when the system detects that the aircraft is significantly
below the normal approach path to a runway (Figure 6-152).
PDA alerting begins when the aircraft is below 700 feet AGL within 15 nm of the destination airport and
ends when the aircraft is 0.5 nm from the runway threshold.
452
Level (FT)
0 5 10
Distance From Runway (NM)
Figure 6-151 FLTA Alert Minimum Terrain and Obstacle Clearance Values
800
700
600
500
400
300
200
100
0
Distance to Destination (NM)
Figure 6-152 PDA Alerting Threshold
Garmin G900X Pilot's Guide
Descending (FT)
15 20 25
PDA ALERTING AREA
30
190-00726-00 Rev. J