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en.wikipedia.org/wiki/Magnetic_declination

Magnetic declination or variation is the angle on the horizontal plane between magnetic north and true north (the direction along a meridian towards the ...

www.ngdc.noaa.gov/geomag/declination.shtml

Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north and true north. Declination is positive east of true north and ...

www.rei.com/learn/expert-advice/compass-declination.html

Mar 20, 2017 ... What's the difference between magnetic north and true north and why is it important to navigation? Learn what declination is and how to adjust ...

www.compassdude.com/compass-declination.php

Learn about magnetic declination effecting compass directions.

www.magnetic-declination.com

Find your location or click on the map to display your magnetic declination, Browse countries What is Magnetic Declination?

education.usgs.gov/lessons/compass.html

May 2, 2017 ... How to adjust the magnetic declination on a compass and orient it with a USGS topographic map.

www.learn-orienteering.org/old/lesson3.html

Lesson 3 of Kjetil Kjernsmo's illustrated compass tutorial. It teaches how to understand the Magnetic Declination. Further it deals with how much you must expect ...

www.thecompassstore.com/whatisdec.html

To understand declination you must first realize that there are two North Poles. There is a True Geographic North Pole at the top of the world, and a Magnetic ...

geomag.org/models/wmm-declination.html

An online calculator for the future geomagnetic main field.