Wilderness Survival Navigation Making An Improvised Compass

MAKING IMPROVISED COMPASS

You can construct improvised compasses using a piece of ferrous metal that can be needle shaped or a flat double-edged razor blade and a piece of nonmetallic string or long hair from which to suspend it. You can magnetize or polarize the metal by slowly stroking it in one direction on a piece of silk or carefully through your hair using deliberate strokes. You can also

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Setting a rifle or handgun scope to optical zero before installation.

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