Garmin 101 Owner's Manual

Also see for 101: Owner's manual Quick start guide Features Owner's manual Installation instructions

Contents

50Main Menu Pages Set Heading PageYou 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’ andpress ENTER to display angle units as degrees (360°). Highlight ‘MILS’ and press ENTER todisplay angle units in mils, a unit of angle measurement used in military settings, in which17.78 mils equal one degree.North Reference: Select the North Reference to match the North Reference used on yourpaper map, if you are using one. Select from True North, Magnetic North, Grid North, orUser 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 verticallines on a map with True North, the direction from any location on the earth’s surface tothe ‘north pole’. Maps are typically referenced to true north. Because a compass points tomagnetic north, not true north, maps indicate the difference between true and magneticnorth with a measurement called variation. The amount of declination changes as youmove 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 allof the grid lines drawn on the map point exactly to the north pole, so the north indicated bythe 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.Setup Menu: Set HeadingSetup MenuSet Heading PageSelecting the angle setting