Garmin G1000 Mooney M20TN - Manual (Page 287)

190-00647-00 Rev. A Garmin G1000 Pilot’s Guide for the Mooney M20M/M20R/M20TN 6-51
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 6-55).
PDA alerting begins when the aircraft is within 15 nm of the destination airport and ends when the aircraft
is either 0.5 nm from the runway threshold OR is at an altitude of 125 feet AGL while within 1.0 nm of the
threshold. During the final descent, algorithms will set a threshold for alerting based on speed, distance, and
other parameters.
Figure 6-55 PDA Alerting Threshold