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    Re: "Magnetic Variation" vs "Magnetic Declination"
    From: Bill B
    Date: 2007 Jan 08, 14:04 -0500

    Lu wrote:
    > I ran into an immediate shock:  while we of the mariner persuasion call
    > the difference between true north and magnetic north "magnetic
    > variation," most of the rest of the scientific community calls it
    > "magnetic declination."
    I'll be interested in the answer. For me it has always been a handy memory
    device to differentiate between deviation and variation.  I know the "d"
    word used in bushwhacking is the same as the "v" word for mariners.  The
    casual bushwhacker has no equivalent of deviation that I am aware
    of--although I bet that is about to change. 
    Along the same "confuse-a-cat" lines, why do triangular-shaped markers (3
    sides) use even numbers, while square markers (4 sides) use odd numbers?
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