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    Re: some navigation info. from a trip aboard the RMS St. Helena
    From: Kevin Redden
    Date: 1999 Oct 04, 8:12 PM

    I think Pierre had the right idea, but wrong implementation. While the ship
    indeed changed time zones, they went west so they steamed for 25 hours
    instead of 24 (or 11!).  377.5/25= 15.1.
    
    Kevin
    
    
    
    >On one particular day the vessel's distance run (between 1200 previous day
    >and 1200 for the day in question), was given as 377.5 nautical miles and
    the
    >officer of the watch went on to say that this implied an average speed of
    >15.1 knots. Some quick calculating had me confused, since this did not seem
    >to work out - after a while I figured it out - who of you on our list can
    >give me the reason for the apparent discrepancy?
    
    They changed ZD so in fact they sailled for only 11 hours. ;-)
    Pierre Boucher
    

       
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