Honeywell Bendix/King KTA970 Pilot's Manual page 54

KTA 970/KMH 980 Pilot's Guide
Installations without a heading input into the GA-EGPWS will either have
a NORTH oriented or BLANK display when on the ground. Depending
upon configuration the display will automatically transition to a TRACK
UP (MAG XXX TRK) orientation upon reaching a configurable airspeed
(typically 10 to 45 kts GPS ground speed). Once the display has transi-
tioned to the TRACK UP display, the depiction of terrain is oriented to the
current GPS track of the aircraft. The display will continue in this TRACK
UP mode until transition below a configurable GPS speed when it will
automatically transition back to either the NORTH UP or BLANK display.
The BLANK display annunciates that the display is currently unavailable
(DISPLAY UNAVAIL).
Installations with a heading input into the GA-EGPWS will present a ter-
rain depiction oriented to the current heading of the aircraft (HEADING
UP). These installations will not transition between different orientations
of the display and will typically present the current heading as `MAG
XXX HDG'.
The most important function of the system is to provide the pilot with eas-
ily interpreted information about terrain/obstacles relative to the aircraft,
and thus increase the pilot's Situational Awareness. In brief, when using
the Terrain Display during flight, the normal presentation of green, yellow
and red colors indicate:
The following chart outlines all the various colors used by the GA-
EGPWS Terrain Display and their functions in providing Situational
Awareness to the pilot. Some display types may not support all colors
Color
Indication
Solid Red
Terrain/Obstacle Threat Area - Warning.
Solid Yellow Terrain/Obstacle Threat Area - Caution.
50% Red Dots
Terrain/Obstacle that is more than 2000 feet above aircraft altitude.
50% Yellow Dots
Terrain/Obstacle that is between 1000 and 2000 feet above aircraft altitude.
25% Yellow Dots
Terrain/Obstacle that is 250 feet below to 1000 feet above aircraft altitude.
Solid Green
Shown only when no Red or Yellow Terrain/Obstacle areas are within range on the
(Peaks only)
display. Highest Terrain/Obstacle not within 250 feet of aircraft altitude.
50% Green Dots
Terrain/Obstacle that is 250 feet below to 1000 feet below aircraft altitude.
Terrain/Obstacle that is the middle elevation band when there are no Red or Yellow
(Peaks only)
terrain areas within range on the display.
16% Green Dots
Terrain/Obstacle that is 1000 to 2000 feet below aircraft altitude.
Terrain/Obstacle that is the lower elevation band when there are no Red or Yellow
(Peaks only)
terrain areas within range on the display.
Black No significant Terrain/Obstacle.
16% Cyan Area having sea level elevation (0 feet MSL).
(Peaks only)
Magenta Dots Unknown terrain. No terrain data in the database for the magenta shown.
Rev 2
EGPWS Functions and Features
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006-18273-0000