Garmin G3X Touch Pilot's Manual page 207

Obstacles are represented on the synthetic vision display by standard two-
dimensional tower symbols found on the Inset Map and Navigation Map. Obstacle
symbols appear in the perspective view with relative height above terrain and distance
from the aircraft. Unlike the Inset Map and Navigation Map display, obstacles on
the synthetic vision display do not change colors to warn of potential conflict with
the aircraft's flight path until the obstacle is associated with an actual terrain alert.
Obstacles greater than 1000 feet below the aircraft altitude are not shown. Obstacles
are shown behind the airspeed and altitude displays.
Arrows indicate the
obstacle is outside the
Synthetic Vision field
of view.
During unusual attitude conditions or when the terrain gradient is great enough
to completely fill the display, a brown (earth) or blue (sky) colored bar at the top or
bottom of the screen is displayed to prevent the pilot from losing sight of the horizon.
Blue Sky Bar with Full Display Terrain
190-01754-00 Rev. A
Obstacle Outside the Synthetic Vision Field of View
Synthetic Vision Obstacle Alerts
Garmin G3X Touch Pilot's Guide
Additional Features
Blue Band
Terrain
Completely
Fills Display
189