52Part Four: Section 2HTAWS OperationObstacle is at or above the aircraft altitude (Red)250 ft250 ft Obstacle is between 250 ft and 0 ftbelow the aircraft altitude (Yellow)Obstacle is 250 ft, or more,below the aircraft altitude (Gray)HTAWS Obstacle Altitude Colors and SymbologyPotential Impact Point Alert LevelWARNING (Red)CAUTION (Yellow)HTAWS Alert Coloring and SymbologyGeneral Database InformationGarmin HTAWS uses terrain and obstacle infor-mation supplied by government sources. The dataundergoes verification by Garmin to confirm accuracyof the content. However, the displayed informationshould never be understood as being all-inclusive.Pilots must familiarize themselves with the appropri-ate charts for safe flight.NOTE: The data contained in the terrain and obstacle data-bases comes from government agencies. Garmin accuratelyprocesses and cross-validates the data, but cannot guaranteethe accuracy and completeness of the data.The terrain/obstacle databases are contained on adatacard which is inserted in the right-most slot of the400W/500W Series units.Database VersionsThe version and area of coverage of each terrain/obstacle database is shown on the Terrain Database Ver-sions Page, located in the AUX Page Group. Databasesare checked for integrity at power-up. If a databaseis found to be missing and/or deficient, the HTAWSsystem fails the self-test and displays the HTAWSsystem failure message.190-00356-30 Rev H
