Start by taking a bearing as normal using your map, then, holding the compass fixed against your hips, turn your body until the red end of the compass needle points to 10° on the ‘W.decl.’ scale.

Knowing how to use a compass, along with a topographical map of the area, means you can navigate those remote locations with confidence. It also opens up the world of orienteering, the sport of ...

Your iPhone's compass is a feature you may not know about, but it can save your life. However, you'll need to calibrate it before tis first use.