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MARK V Enhanced Ground Proximity Warning System (EGPWS)
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The Mark V EGPWS, exceeding the FAA TSO - C151b requirements for TAWS,
provides protection against Controlled Flight Into Terrain (CFIT) and
windshear. The system achieves this objective by accepting a variety of
aircraft parameters as inputs, applying proprietary alerting algorithms, and
providing the flight crew with aural alert messages, visual annunciations, and
displays in the event that the boundaries of any alerting envelope are
exceeded.
EGPWS incorporates many features not found in some competing systems such as
pin-selectable altitude callouts, envelope modulation, geometric altitude
algorithm, turn extrapolation, auto display pop-up, auto tilt of weather radar,
and the ability to host Honeywell's Runway Awareness and Advisory System.
Designed for aircraft equipped with Digital Avionics,
the computer provides for CFIT warnings including:
 | | Excessive descent rate (Mode 1) |
 | | Terrain closure rate (Mode 2) |
 | | Excessive altitude loss after takeoff or missed approach procedure (Mode
3) |
 | | Insufficient terrain clearance (Mode 4) |
 | | Descent below glideslope (Mode 5) |
 | | Excessive bank angle (Mode 6) |
A menu of 64 pin selectable altitude callouts is also provided during approach.
Visual and aural warnings of impending CFIT are provided via Honeywell's unique
computer algorithms that can detect an increase or decrease in aircraft
performance which is indicative of entry into windshear.
Honeywell's MK V EGPWS computers are the only TAWS computers capable of
providing detection and timely alerts of windshear conditions. And with Runway
Awareness and Advisory (RAAS), the MK V EGPWS computers provide increased
awareness at airports to reduce possible runway incursion incidents.
The MK V EGPWS computers also provide:
 | | World wide terrain, obstacle and airport database |
 | | Man-made obstacles database - offers protection against radio and TV
towers, tethered balloons, etc. |
 | | Optional internal GPS card |
 | | Geometric altitude computations - overcomes barometric altimetry
limitations, operations in QFE areas or areas requiring compensation for cold
weather. |
 | | "Peaks" display - provides display of the highest and lowest
elevation terrain within the display range |
 | | Runway clearance floor - provides protection against inadvertent landings
below airport runway thresholds |
 | | Vertical situation display - provides altitude awareness in relation to the
terrain as well as an aircraft trend vector |
 | | Radar autotilt - allows the EGPWS to provide terrain elevation data to
compatible radars for controlling the tilt of the radar antenna during its
scan |
 | | Envelope modulation - provides terrain "fine tuning" at airports
with difficult approaches around significant terrain to increase safety and
decrease potential nuisance alerts |
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