Garmin eTrex Summit Owner's Manual - Page 54

Reference North Reference The amount of variation/declination changes as you move around the earth. 'Magnetic North' is the direction in which a compass needle points. Due to errors introduced when map makers flatten the earth's sphere onto paper, not all of the grid lines drawn on the map point exactly to the north pole, so the north indicated by the grid lines is called 'Grid North'. But, the difference is usually small enough that 'Grid' north can be considered the same as True North for travelling on land. If necessary, you can correct for the difference between Grid North and True North manually. The eTrex Summit will reflect the North Reference setting when using the GPS or Electronic Compass for a bearing. The eTrex Summit automatically adjusts the variation/declination. While it shold rarely be needed the user can manually adjust the variation/declination. F The Electronic Compass will reflect the North Reference setting. If you have selected 'TRUE NORTH' the Electronic Compass will point 'TRUE NORTH' not Magnetic North. To change the North Reference: 1. With the MENU page displayed using the UP or DOWN Button highlight 'SETUP' and press ENTER. 2. Using the UP or DOWN Button to highlight 'HEADING' and press ENTER. The HEADING Page appears. 3. Using the UP or DOWN Button select the 'NORTH REF' field and press ENTER. 4. Using the UP or DOWN Button select the desired reference. Press ENTER. Press PAGE to return to the page of your choice. When you select the 'DEFAULTS' field and press ENTER, the UNITS Page returns to the factory settings. To manually set the variation or declination, highlight the Angle field, press ENTER and input a new angle. 52