AeroNav 900/880 Series Pilot’s Guide
89000039-010
Rev 1 May 2019
Map Subsystem
4-31
TERRAIN AWARENESS (TA)
TA is for general situational awareness purposes and consists of
hatched terrain on any map page. TA will not generate a CAS
message or aural alert.
Terrain Awareness (TA)
TA can be triggered by either terrain or obstacles (e.g. towers > 200’
AGL tall buildings, etc). Any terrain that is within a 10nm radius of
aircraft position and between 100’ (100’ for helicopters) below aircraft
altitude and 10
00’ (500’ for helicopters) below aircraft altitude will
generate yellow hatched indications on the map pages. Any terrain
that is within a 10nm radius of the aircraft position and is 100’ (50’ for
helicopters) below aircraft to anything above aircraft altitude will
generate red hatched indications on the map pages. TA is
automatically turned off when well clear of terrain which is 3000’
(1500’ for helicopters).
Any obstacle in the database within a 5nm radius of the aircraft
position
and whose top is within 2000’ vertically (above or below) of
the aircraft altitude will generate a cyan (blue) threat bubble over the
obstacle on the map pages. Obstacles inside a 3nm radius of the
aircraft position and whose top is between 100’ below aircraft altitude
and 1000’ below aircraft altitude will generate a yellow threat bubble
Summary of Contents for AeroNav 880
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