Garmin GTN 625 Pilot's Manual Upgrade Supplement page 46

10.5.3 Using Terrain Alerting
During unit power-up, the terrain/obstacle database versions are displayed.
At the same time, the terrain system self-test begins, and one of the following
aural messages is generated:
• "Terrain System Test OK"
• "Terrain System Failure"
On the Map page, terrain and obstacles with heights greater than
200 feet Above Ground Level (AGL) display in yellow and red. The
GTN 6XX adjusts colors automatically as the aircraft altitude changes.
Figure 10-5 Terrain Alerting Page Functional Diagram
10.5.4 Displaying Terrain Alerting Data
Terrain uses yellow (caution) and red (warning) to depict terrain and obstacles
alerts relative to aircraft altitude. Colors are adjusted automatically as the aircraft
altitude changes. The colors and symbols shown below are used to represent
terrain, obstacles, and threat locations. Obstacles are removed when more than
2000 ft below the aircraft.
190-01004-03 Rev. N
View
360
Arc
Layers
Flight Plan
Legend
Terrain
Terrain Alerting Inhibit
Alerting
Test Terrain Alerting
GTN 625/635/650 Pilot's Guide
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
10-11