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Subject: A different variation tidbit
From: Yves Arrouye (yves@XXX.XXX)
Date: Wed Feb 13 2002 - 00:39:16 EST
Still involving French and Bowditch...
Bowditch (1995) says:
Deviation: Angle between the magnetic meridian and the axis of a compass
card, [...]
Variation: Angle between the magnetic and geographic meridians at any place.
And my French text book (Cours des Glenans, 1990) say:
Declination: Angle between the magnetic and geographic meridians at any
place.
Deviation: Angle between the magnetic meridian and the axis of a compass
card, [...]
Variation: Sum of the declination and the deviation
Interesting difference, using the same "variation" word, isn't it?
http://www.geolab.nrcan.gc.ca/geomag/e_magdec.html mentions that marines use
(magnetic) variation instead of magnetic declination.
YA
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