User Guide
Garmin G1000 Pilot’s Guide for Cessna Citation Mustang
190-00494-00 Rev. B6-60
HAZARD AVOIDANCE
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 6-63).
PDA alerting begins when the aircraft is within 15 nm of the destination airport. PDA alerting ends when
the aircraft is either:
•
0.5 nm from the runway threshold
OR
•
at an altitude of 125 feet AGL while within 1.0 nm of the threshold.
Figure 6-63 PDA Alerting Threshold
TAWS INHIBIT
TAWS also has an inhibit mode that deactivates the PDA/FLTA aural and visual alerts. Pilots should use
discretion when inhibiting TAWS and always remember to enable the system when appropriate. Only the
PDA and FLTA alerts are disabled in the inhibit mode. For more information, see the section on TAWS
alerts.