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    Re: Sight reduction
    From: Steven Wepster
    Date: 2003 Feb 12, 00:39 +0100

    Dutch: I made a mistake here; upon closer inspection it appears now
    that my tables (JC Lieuwen, Zeevaartkundige Tafels, 1949) are based on
    methods of Souillagouet for altitude and on Dreisonstock for azimuth.
    In the introduction Lieuwen states that he made some improvements:
    azimuth can be found without using logarithms, and altitude can be found
    for the DR position instead of for an auxiliary point, which apparently
    was
    considered as an awkward thing. The nautical triangle is divided in the
    same
    way as in Ageton's method, the difference lies in what functions are
    actually
    tabulated.
    
    By the Japanese method I meant the procedure where you use a small flat
    peace
    of hardware; you only press the buttons; no more flipping of pages,
    scribbling down of intermediate answers, or arithmetic errors. It's more
    convenient but less fun.
    
    I hope this is clearer.
    
    Steven.
    
    
    
    -----------------------------------------------------------
    Steven Wepster                          wepster{at}math.uu.nl
                                            tel +31 30 253 1531
    Mathematisch Instituut
    Universiteit Utrecht
    PO Box 80.010
    3508 TA Utrecht
    The Netherlands
    ===========================================================
    
    On Tue, 11 Feb 2003, Marc Bernstein wrote:
    
    > Just curious what the Dutch modified Ageton and Japanese methods are!?
    >
    
    
    

       
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