HISTORY OF THE MAGNETIC COMPASS AND NAVIGATION INSTRUMENTS WORLD ELECTRIC CIRCUMNAVIGATION CHALLENGE - 3 views
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Niamh McGurk on 03 Jun 12Magnetic Compass A compass is an instrument containing a freely suspended Magnetic element which displays the direction of the horizontal component of the Earth's Magnetic field at the point of observation. The Magnetic compass is an old Chinese invention, probaly first made in China during the Qin dynasty (221-206 B.C.).