Garmin 695, 696 owner manual Terrain, Will change as ground track changes

Overview

Hazard Avoidance

4.2 TERRAIN

WARNING: Do not use Terrain information for primary terrain avoidance. Terrain information is intended only to enhance situational awareness.

GPS Navigation

NOTE: Terrain data is not displayed when the aircraft is outside the installed terrain database coverage area.

NOTE: Terrain depicted in the Profile View is always “ahead” of the aircraft,

Appendices Additional Features Hazard Avoidance Flight Planning

Index

and will change as ground track changes.

The Terrain Page displays altitudes of terrain and obstructions relative to the aircraft position and altitude with reference to a database that may contain inaccuracies. Terrain and obstructions are shown only if they are in the database. Terrain and obstacle information should be used as an aid to situational awareness. They should never be used to navigate or maneuver around terrain.

Note that all obstructions may not be available in the terrain and obstacle database. No terrain and obstacle information is shown without a valid 3-D GPS position.

The GPSMAP 695/696 GPS receiver provides the horizontal position and altitude of the aircraft. Aircraft GPS altitude is derived from satellite position. GPS altitude is then converted to a mean sea level (MSL)-based altitude (GPS-MSL altitude) and is used to determine terrain and obstacle proximity. GPS-MSL altitude accuracy is affected by satellite geometry, but is not subject to variations in pressure and temperature that normally affect pressure altitude sensors. GPS-MSL 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 MSL. Using the GPS position and altitude, the Terrain feature portrays a 2-D picture of the surrounding terrain and obstacles relative to the position and altitude of the aircraft. GPS position and GPS- MSL 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.

Alert windows appear on all pages (except the Terrain (TER) Page) to inform the pilot of proximity to the terrain and obstacles, as well as an unsafe descent rate. These alerts depend on user-defined parameters in the Terrain Page setup.

142 Garmin GPSMAP 695/696 Owner’s Manual 190-00919-00 Rev. F