Displaying Terrain-Svs Data - Garmin G900X Pilot's Manual

HAZARD AVOIDANCE
normally affect pressure altitude sensors. GSL altitude does not require local altimeter settings to determine MSL
altitude. It is a widely-used MSL altitude source.
Terrain and obstacle databases are referenced to GSL. Using the GPS position and altitude, the Terrain-SVS
feature portrays a 3-D picture of the surrounding terrain and obstacles relative to the position and altitude of the
aircraft. GPS position and GSL altitude are used to calculate and predict the aircraft' s flight path in relation to
the surrounding terrain and obstacles. In this way, the pilot can view predicted dangerous terrain and obstacle
conditions.

DISPLAYING TERRAIN-SVS DATA

Terrain-SVS uses yellow (caution) and red (warning) to depict terrain and obstacles (with heights greater
than 200 feet above ground level, AGL) alerts relative to aircraft altitude. Colors are adjusted automatically as
the aircraft altitude changes. The colors and symbols in Figure 6-131 and Tables 6-19 and 6-20 are used to
represent terrain, obstacles, and potential impact points.
Unlighted Obstacle
< 1000' AGL > 1000' AGL < 1000' AGL > 1000' AGL
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Figure 6-131 Terrain Altitude/Color Correlation for Terrain-SVS
Lighted Obstacle
Table 6-19 Terrain-SVS Obstacle Colors and Symbology
Potential Impact
Alert Type
Point Symbol
Warning
Caution
Garmin G900X Pilot's Guide
Obstacle Location
Red obstacle is above or within 100 ft
below the aircraft altitude
Yellow obstacle is between 100 ft and
1000 ft below the aircraft altitude
Example Annunciation
190-00726-00 Rev. J