Magnetic Declination & True North Variance
Calculate the angular offset heading between Magnetic North and True North for geonavigation and compass alignments.
Magnetic Declination Insights
Magnetic declination is the angle on the horizontal plane between magnetic north (the direction the north end of a magnetized compass needle points) and true north (the direction along a meridian towards the geographic North Pole). Westerly magnetic declination points left of true north (negative degree offsets), while Easterly declination points right (positive offsets). Maps and GPS charts must rectify these variances to avoid routing drift.
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