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    Re: Old style lunar
    From: Alexandre Eremenko
    Date: 2004 Dec 10, 10:42 -0500

    This looks to me like a very realistic assessment of the method,
    maybe somewhat on the conservative side:
    
    On Fri, 10 Dec 2004, Frank Reed wrote:
    
    > Here's what Maskelyne has to say about the matter in the preface  to the
    > Nautical Almanac that year:
    > "These new tables [...] seem to give always the Moon's longitude in the
    > Heavens correctly within 45 seconds of a degree; which greatest error, added to
    > the possible error of one minute in taking the Moon's distance from the Sun or
    > a  star at sea, will at a medium produce an error of 50 minutes of  longitude".
    
    If this is so, and if the seamen understood this,
    is seems unwise to correct ones DR position for a lunar
    when the difference is less than 2-3 degrees.
    Maybe this explains why there was no Lunar era, after all?
    
    Alex.
    
    
    

       
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