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    Re: slide rule sight reduction accuracy
    From: Paul Hirose
    Date: 2009 Jun 17, 10:35 -0700

    Regarding the Bygrave simulation, it can be done if I know the rules.
    For instance, azimuth is obtained by taking an arctangent, but that
    function yields a result between -90 and +90. There must be some rule to
    convert that to the range 0 to 360.
    
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