Compass Alone

Navigators of air and ocean often travel by instrument alone; so can climbers. For example, if you are scrambling toward a pass and clouds begin to obscure it, take a quick compass bearing. Then follow the bearing, compass in hand if you wish. You don't even have to note the numerical bearing; just align the magnetic needle with the declination arrow and keep it aligned. Likewise, if you are heading into a valley where fog or forest will hide the mountain that is your goal, take the bearing to the peak before you drop into the valley (fig. 4-15). Then navigate by compass through the valley. This method becomes more reliable if several people travel together with compass in hand, checking each other's work.

Continue reading here: Using Intermediate Objectives

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