Garmin GNC 420W Pilot's Manual Addendum

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Contents

Garmin GNC 420W Pilot's Manual Addendum Manual pdf 38 page image

34Part Three: Section 2TAWS OperationGeneral Database InformationGarmin TAWS uses terrain and obstacle informa-tion supplied by government sources. The data under-goes verification by Garmin to confirm accuracy ofthe content, per TSO-C151b. However, the displayedinformation should never be understood as beingall-inclusive. Pilots must familiarize themselveswith the appropriate charts for safe flight.NOTE: The data contained in the terrain and obstacledatabases comes from government agencies. Garmin accu-rately processes and cross-validates the data, but cannotguarantee the 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 ter-rain/obstacle database is shown on the Terrain Data-base Versions Page, located in the AUX Page Group.Databases are checked for integrity at power-up. If adatabase is found to be missing and/or deficient, theTAWS system fails the self-test and displays the TAWSsystem failure message.Terrain Database InformationDatabase UpdatesTerrain/obstacle databases are updated periodi-cally with the latest terrain and obstacle data. Visit theGarmin website to check for newer versions of terrain/obstacle databases. Compare database cycle numbersto determine if a newer version is available.The database update process includes eitherreprogramming or replacing the database card andinserting the updated card in the right card slot on theunit front panel. The terrain/obstacle database maybe downloaded via the intenet and the card repro-grammed using a USB programmer available fromGarmin. Contact Garmin at 800-800-1020 or atwww.garmin.com for more information.