Rino ® 130 Owner’s Manual 83U NIT OPERATION > SETUP PAGESMap Datum—Offers a selection of nearly all mapdatums in common use. Every map is based on a mapdatum (a reference model of the earth’s shape) and isusually listed in the title block of the map. If you arecomparing GPS coordinates to a paper map, chart, orother reference, the map datum in this field must matchthe horizontal map datum used to generate the map orother reference. The default datum is WGS-84 (WorldGeodetic Survey 1984) and should only be changed whenusing maps or charts specifying a different datum. If amap does specify a datum, use the options list to finddatums applicable to the region of the map, selecting theone that provides the best positioning at a known point.If necessary, you also may choose the User datum forcustom designed grids.NOTE: The User datum is based on a WGS-84-Lo-cal datum and is an advanced feature for unlistedor custom datums. To learn more, check your locallibrary or the Internet for educational materials ondatums and coordinate systems.Distance/Speed—Choose from three units of measure todisplay your rate of travel.Elevation/Vertical Speed—Choose from two units ofmeasure to record your elevation and vertical speed.Pressure—Choose from millibars or Inches to measurethe pressure.Display Setup PageYou can adjust the amount of time that the backlightingfeature stays on and adjust the screen contrast.Backlighting Timeout—Choose from Stays On ordelays of 15 seconds, 30 seconds, one minute, or twominutes before timing out.
