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    Re: Index Card for Trig/Log Table
    From: Hewitt Schlereth
    Date: 2009 Sep 9, 17:12 -0400

    Really interesting, Greg. What log/trig tables are you using?  -Hewitt
    
    On 9/8/09, Greg Rudzinski  wrote:
    > An index card is handy when performing sight reduction with a trig/log 
    table. I set my card up with pre computed entries that are good for a few 
    hours of Sun celestial. The highlighted portions of the attached index card 
    photos show what can be pre calculated before an observation is performed. 
    The remaining computations can be performed at a leisurely pace in less than 
    four minutes. The result is accurate to four places even when the the SIN 
    product is calculated by slide rule. I like the trig/log tables because they 
    are compact enough to fit into my sextant case along with a K&E 4070-3 slide 
    rule .
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