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    Re: Longhand Sight Reduction
    From: Greg Rudzinski
    Date: 2014 Jun 12, 17:37 -0700

    Hanno,

    In place of trig tables would lines on a page graduated like a trig slide rule obtain 4 place precision for cos sin and havsin. Figure 6" lines x 30 for 15 foot of rule per page face. In a way like Gary's flat Bygrave but not transparent. Perhaps Gary could make a proto transparency to function as a 4 place multipication slide rule. Precision on the cheap.

    http://fer3.com/arc/m2.aspx/Longhand-Sight-Reduction-HannoIx-jun-2014-g28005

       
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