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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
A different variation tidbit
From: Yves Arrouye
Date: 2002 Feb 12, 21:39 -0800
From: Yves Arrouye
Date: 2002 Feb 12, 21:39 -0800
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