Discover more of the great outdoors with Navigation Skills for Walkers and Pathfinder (R) Guides. Build confidence and competence in reading maps: using grid references, contour interpretation and visualising terrain. Learn how to use a compass, with map and compass navigation: taking a bearing, magnetic variation and `aiming off’. Make the most of your GPS device: using the information it provides, understanding the limitations of GPS, and geocaching. Gain familiarity with digital mapping: introducing OS Maps, its app and online versions ideal for creating, following and reviewing your own walks.