2 - NAV PAGES
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Premature Descent Alerting (PDA)
The TERRAIN system issues a Premature Descent
Alert (PDA) when the system detects that the aircraft
is significantly below the normal approach path to
a runway. PDA begins when the aircraft is within 15
NM of the destination airport. PDA ends when the
aircraft is either 0.5 NM from the runway threshold
or is below an altitude of 125 feet AGL while within
1.0 NM of the threshold.
CAUTION — The above annunciation and pop-up
terrain alert are displayed during a PDA alert.
PDA Severity Levels
TERRAIN Failure Alert
The TERRAIN system continually monitors
several system-critical items, such as database validity,
hardware status, and GPS status. Should the system
detect a failure, a message is annunciated “TERRAIN
has failed”.
“TERRAIN has failed” message
Terrain Alerts
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Premature Descent Alerting (PDA) Threshold
Summary of Contents for GNS 530W
Page 1: ...500W Series Pilot s Guide Reference...
Page 10: ...INTRODUCTION viii Blank Page...
Page 90: ...4 FLIGHT PLANS 80 Blank Page...
Page 152: ...6 WPT PAGES 142 Blank Page...
Page 196: ...9 AUX PAGES 186 Setup 2 Page Blank Page...
Page 208: ...12 MESSAGES ABBREVIATIONS NAV TERMS 198 Blank Page...
Page 228: ...APPENDIX D Index 218 Blank Page...
Page 229: ......