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    Re: Accuracy of Bygrave
    From: Gary LaPook
    Date: 2009 Jul 7, 22:47 -0700

    See today's response on   Bygrave formula accuracy on 10 inch slide
    rule  thread.
    On Jul 5, 10:49�pm, Gary LaPook  wrote:
    > My experience with the accuracy of the models I made is that it is
    > consistently within two minutes of arc and most often within one minute.
    > This is consistent with what others have written about the instrument,
    > including Bowditch, article 2121. So the error doesn't exceed 2 nautical
    > miles, 2.3 sm.
    > There are some rare special cases that require a slight change in
    > procedure but when the special procedures are followed the accuracy of
    > the computed altitude remains within 2 minutes of arc. See instructions at:
    > http://www.fer3.com/arc/img/108719.revised%20form%206-18-09.pdf
    > Regarding accuracy see the attached documents and:
    > http://www.fer3.com/arc/img/106329.bygrave%20pages%20from%20naca-repo...
    > http://fer3.com/arc/m2.aspx?i=107947&y=200904
    > http://www.fer3.com/arc/img/106329.bygrave%20manual.pdf
    > http://www.fer3.com/arc/img/106329.imgp5241.jpg
    > gl
    > �weems-bygravee.pdf
    > 1304KViewDownload
    > �LykxxBygrave.pdf
    > 317KViewDownload
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