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    Re: Sight Reduction Formula
    From: Jan Kalivoda
    Date: 2003 Oct 28, 13:28 +0100

    After a delay, I should say thanks to Herbert Prinz for his pithy and 
    instructive answer to Ralph's question.
    
    I would only add that the azimuth formula introduced by George Huxtable in 
    this thread (tangent/cotangent formula) became the core of renowned 
    ABC-tables for finding the azimuth from LHA, Lat and Dec ("Time azimuth" 
    according to some editions of Bowditch.) They emerged at the end of the 19th 
    century and remain the part of many European navigation table sets up to now. 
    They never gained such popularity beyond the Atlantic, but they should be 
    taken as the best azimuth tables ever published.
    
    Of course, Alt+Az inspection tables (HO 214, HO 229 etc.) and digital tools 
    replaced them step by step, as Herbert Prinz demonstrated.
    
    
    Jan Kalivoda
    
    
    

       
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