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    Re: Wind & Current Navigation
    From: Fred Hebard
    Date: 2003 Apr 16, 23:26 -0400

    Dan,
    
    It's always nice to see problems posed on which one can ruminate.
    
    We have a full moon tonight, which will increase tides.  I believe the
    tides also are increased by being near the equinox.  So you may have
    experienced much more tide than you usually encounter, although so soon
    after low tide is puzzling.
    
    The wind pushing you sideways is resisted by the keel(s) of the boat
    quite a bit, whereas nothing resists the current, to a first
    approximation.  Also, you boat is not a perfect sail, as Peter Fogg
    pointed out.  Perhaps one of the engineers lurking near will enlighten
    us on the efficiency of various types of sails.
    
    When you are first getting underway, you have not had an opportunity to
    evaluate the effect of the various forces pushing on your boat, so it
    is more difficult to compensate.  I can nervously envision that sinking
    feeling as you were set in towards that pier with very little you could
    do to get yourelf away.
    
    Perhaps throwing a bit of chaff into the water in the future would be
    enlightening, or looking at the water swirl around an anchor chain or
    some such.  The orientation of free-swinging boats at anchor relative
    to wind direction might also be helpful.
    
    Fred
    
    
    

       
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