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    Re: Explaination by Mr. Stark needed
    From: Bruce Stark
    Date: 2003 Jun 12, 00:13 EDT

    Doug,
    
    That statement: "It's such an appealing idea that many of the best navigation
    authorities have been blind-sided by it" IS pretty vague. I really didn't
    know what to say about the fact that a majority of navigation authorities signed
    on to the idea of using lines of position to get GMT from the moon. Every one
    of them knows that the moon being east or west of you doesn't mean you are
    west or east of her. The earth is not flat. Nor is it cylindrical. They also know
    that the accuracy of altitudes taken at sea from a small boat can be
    extremely uncertain.
    
    If you want to use the idea, do it on land with an artificial horizon. And be
    sure to catch the moon when her horns are pointing more or less strait up or
    down. If you work it with time sights (as the eighteenth and nineteenth
    century advocates proposed) you'll save the slippage of accuracy that goes with
    plotting. You'll also save work.
    
    Bruce
    
    
    

       
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