Garmin Foretrex 201 Owner's Manual - Page 62
Setup Menu: Set Heading, Set Heading North Reference - user manual
UPC - 753759045302
View all Garmin Foretrex 201 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 62 highlights
Main Pages Setup Menu: Set Heading Setup Menu Set Heading Page Selecting the angle setting 50 Set Heading Page You can set the angle units and the North Reference in the Set Heading Page. Angle: Select the unit of measurement for angles to display in. Highlight 'DEGREES' and press ENTER to display angle units as degrees (360°). Highlight 'MILS' and press ENTER to display angle units in mils, a unit of angle measurement used in military settings, in which 17.78 mils equal one degree. North Reference: Select the North Reference to match the North Reference used on your paper map, if you are using one. Select from True North, Magnetic North, Grid North, or User North. Refer to the following section, "North Reference," for complete information. Defaults: Press ENTER to set the unit's System settings to the factory defaults. North Reference 'Reference' refers to the orientation of a map's grid. Map makers try to align the vertical lines on a map with True North, the direction from any location on the earth's surface to the 'north pole'. Maps are typically referenced to true north. Because a compass points to magnetic north, not true north, maps indicate the difference between true and magnetic north with a measurement called variation. The amount of 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. The difference, however, is usually small enough that 'Grid' north can be considered the same as True North for travelling on land. If necessary, manually correct for the difference between Grid North and True North. If 'User' is chosen, you must correct for the magnetic variation.