Selecting and using magnetic compasses. — Additional survival tricks

by tonytran2015 (Melbourne, Australia). A magnetic compass uses the local magnetic field generated by the rotating core of the earth to give the rotational axis of the earth. The two directions are reasonably close. The magnetic compass is a secondary directional instrument to people who can observe celestial bodies for navigation but is a primary […]

via Selecting and using magnetic compasses. — Additional survival tricks

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2 comments on “Selecting and using magnetic compasses. — Additional survival tricks

  1. Rifleman III says:

    Everything that tonytran has written, not only do I post it, I convert it to pdf, then transfer it to a thumb drive, so just in case of an emergency, I can pull it up, and at any time, I go over and read every bit of all the items, because they are intelligently written, and are the stuff that will get you out of a jam, by using your head.

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