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    Long Term almanac
    From: Mike Boersma
    Date: 2004 Mar 30, 17:13 -0500

    Its springtime and I have been checking my navigation kit. I have a long
    term almanac copied from the 1977 edition of Bowditch which uses a base
    year of 1972 for its calculations. This is a backup to my navigational
    computer. I am wondering if there is a newer version of the Bowditch
    long term almanac out there. (I know that Bowditch is now online and
    that the online version does not have a long term almanac)
    What, if any, progressional and nutational error will be evident in
    using my almanac (base year 1972)? Should I even be concerned about such
    error? There is about a 2 minute or so discrepancy in sun sights between
    the Bowditch almanac and my computer; there is about a 1 minute or so
    discrepancy in star sights. Some of this error is do to me and my use of
    the tables but I am wondering if a newer almanac would give better
    Mike Boersma

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