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Honeywell EGPWS MK V Pilot's Manual page 38

Enhanced ground proximity warning system
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Non-Peaks
Display
Continued
When a warning alert is triggered, the terrain (or obstacle) that
created the alert is changed to solid red (100% density) as
illustrated below.
Note: When a TAD caution or warning alert is active, the
display image (cells) surrounding the target are enlarged
(surrounding cells are illuminated). This allows a smaller
terrain or obstacle (e.g., a single tower) to be better seen on
the display.
The transition between green and yellow is below the aircraft
in order to account for altimetry and/or terrain/obstacle height
errors. Also, the transition altitudes between colors are biased
upward proportional to the descent rate when greater than
1000 feet per minute. This provides approximately a 30
second advance display of terrain.
Essentially, pilots should note that any yellow or red painted
terrain is at, or above the aircraft's altitude and appropriate
terrain clearance needs to be provided.
System Description
32
60 SECONDS FROM
PROJECTED IMPACT
"CAUTION TERRAIN!"
CAUTION TERRAIN IS
SOLID YELLOW
Mark V and Mark VII EGPWS Pilot's Guide
060-4241-000
Rev H, August 2011

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