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Re: A different variation tidbit
From: Dave Weilacher
Date: 2002 Feb 13, 14:22 -0500
From: Dave Weilacher
Date: 2002 Feb 13, 14:22 -0500
Yves; Did you monitor the discussion about variation and French made GPS? Do you know if variation (declination) is applied opposite in meaning in France vs elsewhere? Original Message: ----------------- From: Yves Arrouye yves@REALNAMES.COM Date: Tue, 12 Feb 2002 21:39:16 -0800 To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM Subject: [NAV-L] A different variation tidbit 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 -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .
