| A free-spinning magnetized needle points toward magnetic north on a compass dial. Magnetic north is located in a different place than the geographic North Pole, or true north. The location of magnetic north is determined by the orientation of the earth’s magnetic field. The location of the North Pole is determined by the axis of the earth’s daily rotation. On maps and navigational charts, true north is offset from magnetic north. To find true north a correction, called the magnetic declination, must be made on all compass readings. |
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