Point of Beginning


November 12, 2008

Posted By Mark J. Mayer on 11/11/2008 at 1:43 PM

I've been asked to determine magnetic north at an airport to an accuracy of 0.2°. The purpose is for aircraft to calibrate their magnetic compasses to true north before takeoff.

So I know I need a compass, but which compass, and where can I get one?

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