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How do I correct a magnetic compass heading to make it refer to true north? If magnetic north moves a different amount each year, how do I find the correction value in the future?

April 26, 2017compass different Heading MAGNETIC moves north refer

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How do I correct a magnetic compass heading to make it refer to true north? If magnetic north moves a different amount each year, how do I find the correction value in the future?

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You add or subtract the declination from the 360 degrees of the compass. Consult the following sites for more information: • Geological Survey of Canada • Geomagnetism – Magnetic Declination • Geomagnetism – Magnetic Declination Calculator • National Geophysical Data Center • Magnetic Declination • Estimated Value of Magnetic Declination • U.S.