Navigation device

Abstract

The navigation device includes a compass module including a base, a permanent dipolar magnet mounted for rotation relative to the base so that the magnet tends to align with the earth's magnetic north, a disc having a display fixed with respect to the magnet, and a transparent cover fixed to the base and arranged over the display surface. The display surface has map indicia for a pre-determined geographic area, map indicia being oriented to define a direction of magnetic north with respect to the map indicia, the indicia being aligned with respect to magnet so that the direction of magnetic north with respect to the map indicia coincides with earth's magnetic north when the magnet is aligned with earth's magnetic north. The compass module is fixed in a housing having a slot from which a folded map of the pre-determined area can be withdrawn, one end of the map remaining fixed to the housing. When the user rotates the map so that indicia on the disc are parallel to corresponding indicia on the map, the user will be correctly oriented to features on the map.

Dependencies are inferred from the claim text.