02 GPSMAP 3205 Owner’s ManualaPPendIX > carIng for the gPsMaP 3205If the active GRI Chain, secondary stations, or offsets were changed since thewaypoint was created, the waypoint now references the active GRI-chain andsecondary stations and adjusts the TD coordinates accordingly. Remember thatthe GPS is not relying on the LORAN signal for navigation and actually convertsthe TD coordinate to a useful latitude/longitude coordinate (in the background)before storing the waypoint to memory or using it for navigation. Because of this,the unit can navigate to a TD coordinate anywhere in the world.For more information on LORAN TDs, you can download Garmin’s Loran TDPosition Format Handbook from the Garmin Web site.Caring for the GPSMAP 3205The GPSMAP 3205 case is constructed of high-quality materials and does notrequire user maintenance except cleaning.Cleaning the CaseClean the unit’s outer casing (except for the screen) using a cloth dampened witha mild detergent solution and then wipe dry. Avoid chemical cleaners and solventsthat may damage plastic components.Cleaning the ScreenThe GPSMAP 3205 lens is coated with a special anti-reflective coating that issensitive to skin oils, waxes, and abrasive cleaners. Cleaners containing ammonia,alcohol, abrasives, or anti-grease detergents will harm the anti-reflective coating.It is important to clean the lens using an eyeglass lens cleaner (that is specified assafe for anti-reflective coatings) and a clean, lint-free cloth.StorageDo not store the GPSMAP 3205 where prolonged exposure to extremetemperatures may occur (such as in the trunk of a car) because permanent damagemay result. User information, such as waypoints and routes are retained in theunits memory without the need for external power. It is always a good practiceto back up important user data by manually recording it, loading it to a computer(transferring it to MapSource), or storing it on a data card.Water ImmersionThe GPSMAP 3205 is waterproof to IEC Standard 60529 IPX7. It can withstandimmersion in 1 meter of water for 30 minutes. Prolonged submersion can causedamage to the unit. After submersion, be certain to wipe and air dry the unitbefore reuse.