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    Re: Please tell me if I have this right
    From: Robert Gainer
    Date: 2006 Apr 18, 16:58 -0400

    Greg,
    I would think that if you don?t know the amount of error (drift from unknown 
    current) you couldn?t build in a correction.  The unknown is just that, 
    unknown.
    All the best,
    Robert Gainer
    
    >
    > From: "cfi{at}licfi.com" 
    > Date: 2006/04/18 Tue PM 03:53:18 EDT
    > To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    > Subject: Please tell me if I have this right
    >
    > To the List,
    >    All - when doing a time sight at sea in period say circa 1780,
    > I seem to have gleaned "the latitude used was the estimated latitude"?
    > I assume this means latitude from a noon sight was applied (with DR
    > corrections)to the time sight that was done 2-3 hours before or after
    > the noon sight? while they certainly would not have traveled far at
    > say 6 to 12 knots some error would have undoubtably crept in due to
    > unknown currents etc. and it would not be impossible for the actual
    > lattitude to be off by 2-4 miles. How did they compensate for this
    > any ideas?
    >                                    -Greg
    >
    >
    > --------------------------------------------------------------------
    > mail2web - Check your email from the web at
    > http://mail2web.com/ .
    >
    
    
    

       
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