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    Re: Time of meridian passage accuracy
    From: Douglas Denny
    Date: 2009 Oct 1, 04:04 -0700

    Since I had in mind nineteenth century sailing navigation and the religious 
    zeal for a noon sight using meridian altitude;  I had better modify my 
    statement with a caveat:-
    
    "the effect is very small as to be of no practical concern to practical 
    navigators....... of sailing boats".
    
    Sailing your boat at 300 knots is slightly different.  Better then include Coriolis correction too!
    
    Douglas Denny.
    Chichester. England.
    
    =====================================
    
    James N Wilson wrote:
    > Douglas:
    >  
    > You state that "the effect is very small as to be of no practical concern to practical navigators."
    >  
    > I compiled a table in my Navigation paper showing differences between 
    maximum alititude and meridian passage ranging from 10 seconds to 37 minutes. 
    My trial which led me to write the paper had a difference of a minute and a 
    half, and that was at a moderate latitude and sailboat speeds.
    >  
    > Jim Wilson
    
    
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