10-3190-01004-03 Rev. P GTN 625/635/650 Pilot’s GuideForewordGettingStartedAudio &Xpdr CtrlCom/NavFPLDirect-ToProcWpt InfoMapTrafficTerrainWeatherNearestServices/MusicUtilitiesSystemMessagesSymbolsAppendixIndex10.3 General Database InformationGarmin TAWS and HTAWS use terrain and obstacle information supplied bygovernment and private sources. The data undergoes verification by Garmin toconfirm accuracy of the content. However, the displayed information shouldnever be understood as being all-inclusive. Pilots must familiarize themselveswith the appropriate charts for safe flight.NOTE: The data contained in the terrain and obstacle databases comesfrom government and private agencies. Garmin accurately processes andcross-validates the data, but cannot guarantee its accuracy or completeness.10.3.1 Database VersionsThe version and area of coverage of each terrain/obstacle database is shownon the System-System Status page. Databases are checked for integrity atpower-up. If a database is found to be missing and/or deficient, theTAWS/HTAWS system fails the self-test and displays the TAWS/HTAWS systemfailure message.10.3.2 HTAWS Database RequirementsTo function properly, HTAWS requires the use of databases specific tohelicopters and HTAWS. The databases required are:• 2.5 arc-second Terrain Database• Helicopter Obstacle Database• Helicopter Navigation Database10.3.3 Database UpdatesFor information on how to update databases, refer to section 18.2.
