10-12
GTN 625/635/650 Pilot’s Guide
190-01004-03 Rev. P
Terrain
Threat Location
Unlighted Obstacle
Projected Flight Path
1000 ft
100 ft Threshold
Terrain more than 1000 ft below the aircraft altitude (Black)
Terrain between 100 ft and 1000 ft below the
aircraft altitude (Yellow)
Terrain above or
within 100 ft
below the aircraft
altitude (Red)
Figure 10-6 Terrain Altitude/Color Correlation for Terrain Proximity
Unlighted Obstacle
Lighted Obstacle
Threat
Location
Indicator
Terrain
Color
Terrain/
Obstacle
Location
Alert
Level
< 1,000 ft
AGL
< 1,000 ft
AGL
< 1,000 ft
AGL
< 1,000
ft AGL
Obstacle Symbol
Red
Terrain/
Obstacle at or
within 100 ft
below current
aircraft
altitude
WARNING
(Red)
Yellow
Terrain/
Obstacle
between
100 ft and
1,000 ft
below current
aircraft
altitude
CAUTION
(Yellow)
White
Terrain/
Obstacle
between
1,000 ft
and 2,000 ft
below current
aircraft
altitude
Table 10-5 Terrain/Obstacle Colors and Symbology
Tower
Windmill
Windmill in Group
Power Line
Table 10-6 Obstacle Icon Types
Summary of Contents for GTN 625
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