Garmin RINO 520 Owner's Manual - Page 92
Map Datum, Distance/Speed, Elevation/Vertical Speed, Pressure, Temperature, Depth, Choose from Feet
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Unit Operation > Setup Pages For more information on Loran TDs, you may download Garmin's Loran TD Position Format Handbook from the Garmin web site at http://www.garmin.com/support/ userManual.jsp. Map Datum-Offers a selection of nearly all map datums in common use. Every map is based on a map datum (a reference model of the earth's shape) and is usually listed in the title block of the map. If you are comparing GPS coordinates to a paper map, chart, or other reference, the map datum in this field must match the horizontal map datum used to generate the map or other reference. The default datum is WGS-84 (World Geodetic Survey 1984) and should only be changed when using maps or charts specifying a different datum. If a map does specify a datum, use the options list to Find datums applicable to the region of the map, selecting the one that provides the best positioning at a known point. If necessary, you also may choose the User datum for custom designed grids. NOTE: The User datum is based on a WGS-84-Local datum and is an advanced feature for unlisted or custom datums. To learn more, check your local library or the Internet for educational materials on datums and coordinate systems. Distance/Speed-Choose from five units of measure to display your rate of travel. Elevation/Vertical Speed-Choose from three units of measure to record your elevation and vertical speed. Pressure-Choose from inches, millibars, or hectopascals to measure the pressure. Temperature-Choose from Celsius or Fahrenheit. Depth-Choose from Feet, Fathoms, or Meters. 82 Rino® 520/530 Owner's Manual