The EGPWS incorporates the functions of the basic Ground
Proximity Warning System (GPWS). This includes the
following alerting modes:
Additionally, Windshear alerting (Mode 7) is provided for
specific aircraft types. Mode 7 provides windshear caution
and/or warning alerts when an EGPWS windshear threshold is
The EGPWS adds to these 7 basic functions the ability to
compare the aircraft position to an internal database and
provide additional alerting and display capabilities for
enhanced situational awareness and safety (hence the term
The EGPWS internal database consists of four sub-sets:
1. A worldwide terrain database of varying degrees of
2. An obstacles database containing cataloged man-made
3. A worldwide airport database containing information on
4. An Envelope Modulation database containing information
Excessive Descent Rate
Selected Altitude Callouts
objects 100 feet or greater in height located within North
America, portions of Europe and portions of the Caribbean
(expanding as data is obtained).
runways 3500 feet or longer in length. For a specific list of
the airports included, refer to Honeywell document 060-
on airport approach and departure profiles to support the
Envelope Modulation feature.
Mark V and Mark VII EGPWS Pilot's Guide
Excessive Terrain Closure
Altitude Loss After Takeoff
Unsafe Terrain Clearance
"Too Low Terrain"
"Too Low Gear"
"Too Low Flaps"
Rev H, August 2011