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    Re: leg56. Chart vs formulas
    From: Dan Hogan
    Date: 1999 Jul 16, 09:36 EDT

    Mercator Sailing:
            Provides a solution to the plot as made on a mercator chart. Uses
    meridonial differences and difference of longitude in place of
    difference of latitude and departure, respectively.
    Rhumb Lines:
            Maintains a true direction. Makes the same angle with all meridians
    it crosses. Maintains a straight line on a mercator chart. The
    difference between the Rhumb line and the Great Circle connecting two
    points increases as (1) as the latitude increases, as the difference in
    latitude between two places decreases, and (3) as the difference of
    longitude increases.
    >I don't know what is the difference between mercator sailing and
    >rhumbline, for me is the same ??
    Dan Hogan
    dhhogan{at}XXX.XXX
    

       
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