Garmin eTrex Legend C Owner's Manual - Page 54

Main Menu Setup Options Units Page Position Format Options Menu Map Datum Options Menu Distance/Speed Options Vertical Speed Options Elevation Options Depth Options 44 Units Page The Units features are best used by individuals with a working knowledge of map grids and datums. To learn more about these subjects, visit the National Imagery and Mapping Agency at http://www.nima.mil or inquire at your library. Position Format - Allows you to choose from different grid formats. The default position format, 'hddd°mm.mmm' displays the latitude and longitude in degrees and minutes and is most commonly used. 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). 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. Distance/Speed - You can choose from three units of measure to display your rate of travel. Elevation - You can choose from two units of measure to display your elevation. Vertical Speed - You can choose from three units of measure to display your rate of ascent and descent. Depth - You can choose from three units of measure to display the depth of an area shown on a map. To select Units Page options: 1. For all fields on this page, highlight the field and then press the THUMB STICK to display the Options Menu for the field. 2. Highlight the desired option on the menu and then press the THUMB STICK to place it in the field.