Instrument

because the topography is featureless or because landmarks are obscured by forest or fog. You do know exactly where you are and where you want to go, and can identify both the current position and the destination on the map. Simply measure the bearing from your position to your objective on the map, then follow that bearing. Let's say you get a bearing of 285 degrees (fig. 4-14a). Read this bearing at the index line and leave it set there as is (fig. 4-14b). Hold the compass out in front of you as you rotate your body until the north-seeking end of the magnetic needle is aligned with the pointed end of the declination arrow. The direction-of-travel line now points to the objective (fig. 4-14c). Start walking.

Continue reading here: Compass Alone

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