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Subject: Re: A different variation tidbit
daveweilacher@XXX.XXX
Date: Wed Feb 13 2002 - 14:22:37 EST
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:
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From: Yves Arrouye yves@XXX.XXX
Date: Tue, 12 Feb 2002 21:39:16 -0800
To: NAVIGATION-L@XXX.XXX
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
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