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    Re: query
    From: Michael Wescott
    Date: 2002 Aug 21, 15:57 -0400

    > If I am at lat1, long1,  and go XXX nm at TC YYY, What is the exact
    > formula from spherical trigonometry to get lat2, long2 ?
    > It would be constant TC.
    An exact formula conforming to one of the standard ellipsoids
    requires some rather hairy integral calculus. For practical purposes,
    a reasonable solution is to use "Mercator Sailing". See chapter 24
    of the American Practical Navigator (a.k.a. Bowditch) on the web at
    "http://pollux.nss.nima.mil/pubs/". This method uses meridional parts
    (see "Table 6" and "Explanation of Navigational Tables" in the same pub).
            Mike Wescott

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