Garmin GNC 420AW Pilot's Manual

Also see for GDL 69: Pilot's guide addendum Pilot's guide addendum Activation Instructions Activation Instructions Pilot's guide addendum

Contents

Garmin GNC 420AW Pilot's Manual Manual pdf 70 page image

64Part FiveTerrain ProximityTerrain Proximity LimitationsTerrain Proximity displays terrain and obstruc-tions relative to the altitude of the aircraft. Individualobstructions may be shown if available in the database.However, all obstructions may not be available in thedatabase and data may be inaccurate. Never use thisinformation for navigation or to maneuver to avoidobstacles.Terrain Proximity information is based on terrainelevation information in a database that may containinaccuracies. Terrain Proximity information should beused as an aid to situational awareness. Never use it fornavigation or to maneuver to avoid terrain.Terrain Proximity uses terrain and obstacle informa-tion supplied by government sources. The displayedinformation should never be understood as being all-inclusive.NOTE: The data contained in the terrain andobstacle databases comes from governmentagencies. Garmin accurately processes and cross-validates the data but cannot guarantee the ac-curacy and completeness of the data.System StatusThe Terrain Proximity system continually monitorsseveral system-critical items, such as Terrain Proxim-ity database validity, hardware status, and GPS status.The Terrain Proximity page will post the message “NODATA” when the terrain database is not available.A blue cross-hatching pattern is shown when out ofthe area of coverage, but no system message is posted.Unlighted Obstacle Lighted ObstacleColor Obstacle LocationObstacle Symbol< 1000 ftAGL> 1000 ftAGL< 1000 ftAGL> 1000 ftAGLRed Obstacle is at or above current aircraft altitudeYellow Obstacle is between 250 ft and 0 ft below current aircraftaltitudeWhite Obstacle is 250 ft, or more, below current aircraft altitudeTerrain Proximity Obstacle Coloring and Symbology190-00356-30 Rev H