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Honeywell EGPWS MK V Pilot's Manual page 36

Enhanced ground proximity warning system
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Terrain
In -210-210 and later versions, the look-ahead alerting
algorithms are improved at higher airspeeds (about 300 knots
Look Ahead
or greater). The look-ahead distance is designed to provide a
Alerting
60-second warning alert up to 8 nm look-ahead (as opposed to
30-seconds or up to 4 nm). With version -218-218 and later,
Continued
the look-ahead distance is increased by 12.5%, and the
allowed terrain clearance height is increased for descents at
high speeds to improve alerting times.
The specific aural message provided is established during the
initial installation of the EGPWS as a function of whether or
not the terrain and obstacles features are enabled and the
selected audio menu (via program pin selection).
Refer to an applicable AFM or EGPWS AFMS for specific
application information or contact Honeywell for additional
information.
When a compatible Weather Radar, EFIS, or other display is
Terrain
available and enabled, the EGPWS Terrain Alerting and
Alerting
Display (TAD) feature provides an image of the surrounding
and Display
terrain represented in various colors and intensities.
There are two types of TAD displays depending on the
options selected. The original type provides a terrain image
only when the aircraft is 2000 feet or less above the terrain. A
second
characteristics to provide a higher degree of terrain awareness
independent of the aircraft's altitude (available for selected
display types in version -206-206 with additional displays
added in later versions). In either case, terrain and obstacles
(if enabled) forward of the aircraft are displayed. Obstacles
are presented on the cockpit display as terrain, employing the
same display-coloring scheme. TAD, Peaks and Obstacle
functions are enabled by EGPWS program pin selection.
Note: With respect to Non-Peaks or Peaks display, terrain and
or obstacle presentation is always based on (and scaled for)
the geographic area available for display. Consequently,
terrain and/or obstacles outside of the selected display range
and defined display sweep do not have any effect on the
displayed image.
Non-Peaks
The Non-Peaks display provides a graphical plan-view image
of the surrounding terrain as varying density patterns of green,
Display
yellow, and red as illustrated in the following graphics. The
selected display range is also indicated on the display, and an
indication that TAD is active is either indicated on the display
(i.e., "TERR") or by an adjacent indicator.
System Description
30
Mark V and Mark VII EGPWS Pilot's Guide
type
called
"Peaks"
enhances
the
060-4241-000
Rev H, August 2011
display

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