User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
If the Eleview feature is enabled, the display will have two three-digit
elevation numbers. The top number represents the highest terrain
elevation and the bottom number represents the lowest terrain elevation
displayed in color. Each elevation expressed in hundreds of feet (e.g.,
250 is 25,000 ft MSL). The eleview slices are sized as a proportion of the
terrain amplitude spread. The spread changes as the terrain in range
changes. The spread percentages are configurable by ACSS. In a
situation where the spread between the highest and lowest elevation is
very low, the display will only show one shade of green with black. If the
display supports cyan, water will be depicted. If the display does not
support cyan, water will remain black.
NOTE:
The MTCD margin is used in order to determine the limit
between slice #3 and #4. The MTCD is the minimum safe
distance between the aircraft and the terrain when
considering a CFIT situation. This clearance is usually about
600 feet (182.88 meters) en route and is progressively
reduced to 30 feet (9.144 meters) in the short final approach
phase of flight. This allows the pilot to see the green-to-yellow
terrain slice transition anytime terrain is within MTCD of the
aircraft.
NOTE:
Eleview digits will not be displayed in the following situations:
If the Display Spread in the Viewable area (i.e., the difference
between the maximum terrain or obstacle height and the
minimum terrain or obstacle height) is less than 750 feet, then
the minimum elevation number is removed, regardless of
height of aircraft.
If the Display Spread in the Viewable area is no higher than
200 feet above the runway, and the aircraft position is within
15 NM and 3500 ft height of the runway elevation, then the
maximum and minimum elevation numbers are removed.
Figure 1-25: Terrain Slices
A typical terrain background image is shown in Figure 1-26.
Pub. No. 8600200-001, Revision 004
34-45-29
1-95
04 Nov 2014
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