Garmin 400-500 User Manual
34
Section 2
TERRAIN Operation
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.
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.
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
Lighted Obstacles
<1000’ AGL
Unlighted Obstacles
>1000’ AGL
Lighted Obstacles
>1000’ AGL
Potential Impact Points
Color Interpretation
The Garmin TERRAIN system uses black, yellow, and red to depict terrain information relative to
aircraft altitude (Figure 2-6 and Table 2-1).
Terrain Color Symbology
Potential Impact Point
Unlighted Obstacle
Projected Flight Path
1000' AGL
100' Threshold
Figure 2-6: TERRAIN Altitude/Color Correlation
Figure 2-5: Enabling Terrain
Table 2-1: TERRAIN Color Symbology