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    Re: Table A4 + elevation?
    From: Fred Hebard
    Date: 2003 May 3, 12:39 -0400

    George,
    
    You should note that Doug Royer's experience is almost entirely at sea,
    and that he usually gets to within 0.1' of arc of his position!  Here,
    he's complaining about aberrant readings on land with an artificial
    horizon.
    
    One other error in Doug's position may come from deflection from the
    vertical.  There was a thread on this about a month ago, and Paul
    Hirose posted a pointer to an interesting Dutch site over on the Yahoo
    Sextant forum.  That link is
    http://www.dekoepel.nl/Geodetic-Astronomy.html.
    
    Fred
    
    
    

       
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