400/500 Series Garmin Optional Displays

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Section 2
TERRAIN Operation
Figure 2-5: Enabling Terrain
Color Terrain/Obstacle Location
Red Terrain/Obstacle is within 100’ or
above aircraft altitude.
Yellow Terrain/Obstacle is within 1000’ of
aircraft altitude.
Black Terrain/Obstacle is more than 1000’
below aircraft altitude.
Table 2-1: TERRAIN Color Symbology
To enable TERRAIN:
1. Select the TERRAIN Page and press MENU. ‘Enable Terrain?’ is selected by default (Figure 2-
5).
2. Press ENT. The TERRAIN system is functional again.
TERRAIN Symbols
The following symbols are used to represent obstacles and potential impact points on the Terrain Page.
Note that obstacle symbols are shown on display zoom ranges up to 10 nm:
Unlighted Obstacles
1000’ AGL
Potential Impact Points
The Garmin TERRAIN system uses black, yellow, and red to depict terrain information relative to
aircraft altitude (Figure 2-6 and Table 2-1).
1000' AGL
100' Threshold
Projected Flight Path
Unlighted Obstacle
Figure 2-6: TERRAIN Altitude/Color Correlation
Potential Impact Point