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Rev. D - March 2000 - Honeywell EGPWS MK V Pilot's Manual

Enhanced ground proximity warning system
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Table of Contents
EGPWS
Database
continued
060-4241-000 • Rev. D - March 2000
MK V & MK VII EGPWS Pilot Guide
Honeywell is constantly striving to improve the EGPWS data-
base in content, resolution, and accuracy. Notification of a
Database update is accomplished by Service Bulletin. Data-
base updates are distributed on PCMCIA data cards and
downloaded via a card slot in the front panel of each EGPWC.
Contact Honeywell for additional information.
Because the overwhelming majority of "Controlled Flight Into
Terrain" (CFIT) accidents occur near an airport, and the fact
that aircraft operate in close proximity to terrain near an air-
port, the terrain database contains higher resolution grids for
airport areas. Lower resolution grids are used outside airport
areas where aircraft enroute altitude make CFIT accidents less
likely and terrain feature detail is less important to the flight
crew.
With the use of accurate GPS or FMS information, the EGPWS
is provided present position, track, and ground speed. With
this information the EGPWS is able to present a graphical plan
view of the aircraft relative to the terrain and advise the flight
crew of a potential conflict with the terrain or obstacle. Con-
flicts are recognized and alerts provided when terrain violates
specific computed envelope boundaries on the projected flight
path of the aircraft. Alerts are provided in the form of visual
light annunciation of a caution or warning, audio enunciation
based on the type of conflict, and color enhanced visual display
of the terrain or obstacle relative to the forward look of the air-
craft. The terrain display is provided on the Weather Radar
Indicator, EFIS display, or a dedicated EGPWS display and may
or may not be displayed automatically.
The following sections provide functional descriptions of the
EGPWS basic and enhanced functions and features, and sys-
tem input and output requirements.
9

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