Garmin GTN 750 Pilot's Guide - Page 228

Terrain utilizes terrain and obstacle databases that are referenced to mean Foreword sea level (MSL). Using the GPS position and GSL altitude, Terrain displays a Getting 2-D picture of the surrounding terrain and obstacles relative to the position and Started altitude of the aircraft. In this manner, Terrain Proximity can provide advanced Audio & alerts of predicted dangerous terrain conditions. Xpdr Ctrl Terrain requires the following to operate properly: Com/Nav • The system must have a valid 3-D GPS position solution. FPL • The system must have a valid terrain/obstacle database. Direct-To Proc Charts Wpt Info Map Traffic Terrain View Layers 360 Arc Flight Plan Legend Figure 11-1 Terrain Proximity Page Functional Diagram Weather Nearest Music Utilities System Messages Symbols Appendix Index 11-2 Garmin GTN 725/750 Pilot's Guide 190-01007-03 Rev. B