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    Bowditch long-term almanac
    From: Paul Hirose
    Date: 1998 Nov 28, 12:51 EST

    I used the Bowditch long-term almanac for some Silicon Sea sights.  As
    I recall, it was within a minute of the Nautical Almanac.
    Usage is more complex, though.  It's slower and there's greater chance
    of a mistake.  Finally, you can't get moon or planetary positions from
    such an almanac.
    There's not much to the long-term almanac.  A decent typist could
    reproduce the instructions and tables in a weekend.  (No, I'm not
    volunteering.)
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