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    Re: Noisy Sea Surface
    From: Chuck Taylor
    Date: 2003 Nov 15, 19:24 -0800

    Keith Williams wrote:
    
    > The noise appears to come from all parts of
    > the hull below water.
    
    That reminds me of another kind of underwater noise I
    once heard.
    
    Our 32-foot wooden Grand Banks trawler was moored to a
    buoy at James Island State Park (north of Seattle, WA,
    east of Victoria, B.C.) one early October evening a
    couple of years ago. As my wife and I were about to
    retire for the evening, we heard a mechanical noise
    coming from somewhere low in the vessel.  It sounded
    like a pump running.  I checked all the pumps on
    board, but couldn't locate where the noise was coming
    from. Finally we realized that what we were hearing
    was mechanical noise from a ferry boat passing about a
    mile away.  The sound from the ferry was transmitted
    through the water and through our wooden hull.  It
    reminded me of a scene from one of those old WWII
    submarine movies where the sonarman listened to the
    propeller and engine noises from the surface ships.
    
    Chuck Taylor
    Everett, WA, USA
    
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