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Section 2
TERRAIN Operation
Figure 2-1: Power-up Sequence
Figure 2-2: TERRAIN Page
Section 2: TERRAIN Operation
Power Up
During power-up of the 400/500 Series unit, the terrain/obstacle database versions are displayed along
with a disclaimer (Figure 2-1). At the same time, the TERRAIN system self-test begins. A failure message
is issued if the test fails (see page 41).
TERRAIN Page
The TERRAIN Page is in the NAV group of pages (see the 400/500 Series Pilot’s Guide for detailed
information regarding page groups and pages). To display the TERRAIN Page, select the NAV group and
turn the
small right knob
until the TERRAIN Page is displayed (Figure 2-2). The page displays terrain
information, aircraft ground track, and GPS-derived MSL altitude. Altitude is shown in increments of 20
feet or in increments of 10 meters, depending on unit configuration. The ‘G’ to right of the MSL altitude
display reminds the pilot that altitude is GPS-derived.
The TERRAIN Page has two selectable view settings:
•360˚ View—View from above aircraft depicting surrounding terrain on all sides
•120˚ View—View of terrain ahead of and 60˚ to either side of the aircraft flight path
NOTE: The TERRAIN Page gives a ‘Track Up’ display orientation, as indicated by the ‘TRK’
label shown on the display. This is the only orientation available on this page.
To display a 120˚ view:
1. Select the TERRAIN Page and press
MENU
.
2. Select ‘View 120˚?’.
3. Press
ENT
. To switch back to a 360˚ view, repeat step 1, select ‘View 360˚?, and press
ENT
.
