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    Re: Followon: Meridional parts
    From: Chuck Taylor
    Date: 1997 Jul 12, 10:33 PM

    Patrick McVey wrote:
    >  Why do navigators call this a meridional part?
    The root of the word "meridional" means "southern". It once referred to
    the position of the sun at midday, which was to the south for
    inhabitants of the northern hemisphere. It has come to refer to the
    meridians of longitude, specifically the length of a meridian of
    longitude on a Mercator chart, measured from the equator to a particular
    parallel of latitude. By definition, one meridional part is the length
    of one minute of longitude at the equator.
    So, getting back to your question, perhaps it is called that because it
    is used to measure the length of a meridian.
    Chuck Taylor
    Everett, WA
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