magnetic declination(redirected from Compass variation)
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The angle between magnetic north and true north at a particular location. Also called magnetic variation.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Navigation) the angle that a compass needle makes with the direction of the geographical north pole at any given point on the earth's surface. Also called: declination or magnetic variation
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
The horizontal angle between the true geographic North Pole and the magnetic north pole, as figured from a specific point on the Earth.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The angle between the magnetic and geographical meridians at any place, expressed in degrees east or west to indicate the direction of magnetic north from true north. In nautical and aeronautical navigation, the term magnetic variation is used instead of magnetic declination and the angle is termed variation of the compass or magnetic variation. Magnetic declination is not otherwise synonymous with magnetic variation which refers to regular or irregular change with time of the magnetic declination, dip, or intensity. See also magnetic variation.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
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|Noun||1.||magnetic declination - the angle (at a particular location) between magnetic north and true north|
angle - the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians
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