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Honeywell MK VIII Pilot's Guide

Honeywell MK VIII
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060-4314-000 • Rev. C - May 2004
28 MK VI & MK VIII EGPWS Pilot Guide
Runway
Field
Clearance
Floor
RFCF Alert Envelope
Runway selection logic incorporates comprehensive aircraft posi-
tion and navigation information to evaluate proximity runways
and determine the most likely destination runway for all alerting
purposes.
A Runway Field Clearance Floor feature is similar to the TCF
feature except that RFCF is based on the current aircraft posi
-
tion and height above the destination runway, using Geometric
Altitude (in lieu of Radio Altitude). This provides improved pro
-
tection at locations where the runway is significantly higher than
the surrounding terrain as illustrated below. With version -022
and later models, the inner limit of the RFCF envelope is moved
from 1 nm to 1/2 nm of runway end, if runway and position data
is of high integrity.
Terrain
Clearance
Floor
Continued
TCF and RFCF alerts result in illumination of the EGPWS alert
lights and the aural message “TOO LOW TERRAIN”. The audio
message is provided once when initial envelope penetration oc-
curs and again only for additional 20% decreases in Radio or
Geometric Altitude. The EGPWS alert lights remain on until the
TCF/RFCF envelope is exited.

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Honeywell MK VIII Specifications

General IconGeneral
BrandHoneywell
ModelMK VIII
CategorySecurity System
LanguageEnglish

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