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    Re: The mathematics of tacking downwind
    From: Gary LaPook
    Date: 2016 Jul 29, 01:57 -0700

    I like the scales on your sliderule. Your tan scales cover 4 cycles from 0-34' to 5-42'; to 45-00'; to 84-17'; and then all the way up to 89-25' whch make it very convienent to use the Bygrave procedure which produces more accurate results with a slide rule than the sine-cosine procedure.

    gl

       
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