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    Re: A noon sight conundrum
    From: Jared Sherman
    Date: 2003 Dec 2, 16:43 -0500

    If your "mean" translates into the Yankee "tightwad", then in fact one can 
    simply buy a perpetual almanac, of the abbreviated type found in the back of 
    Hewitt Schlereth's books on navigation and others. They include 4 sets of 
    data, plus the recurring years (198x, 199x, 199y, etc.) for which eash 
    particular set should be used, plus one offset correction to be added to each 
    set for each four-year cycle. Considering the physical amount of space they 
    can avoid consuming, these permanent almanacs were logical for small craft. I 
    say "were" because of course with modern electronics in the past 15 years, 
    there are even smaller ways to carry better data.
    The change to the Gregorian Calendar (the conventional western AD calendar) 
    reflects, what, something like a ten-day shift that Pope Gregory decreed in 
    order to make the paper calendar line up with an astronomical one (a sun 
    calendar) that he'd noticed was that far out of alignment after what, 
    1300-odd? years.

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