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Compass, Magnetic Reference library
The Oxford Companion to World Exploration
A magnetic compass is an instrument used to determine the direction toward the earth's North Magnetic Pole by means of
magnetic compass Quick reference
The Oxford Companion to Ships and the Sea (2 ed.)
a compass which depends for its directive property on the horizontal component of the earth's magnetic field. Its origins are obscure and although the earliest references to its use at sea ...
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magnetic compass Reference library
The Oxford Essential Dictionary of the U.S. Military
an instrument containing a freely suspended magnetic element that displays the direction of the horizontal component of the earth's magnetic field at the point of observation....
magnetic Quick reference
The Oxford Dictionary of Phrase and Fable (2 ed.)
magnetic north the direction in which the north end of a compass needle or other freely suspended magnet will point in response to the earth's magnetic field. It deviates from true north ...
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