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    Re: Noisy Sea Surface
    From: Aubrey O?Callaghan
    Date: 2003 Nov 17, 17:44 +0000

    Hmmm !
    The Americans did something that near Hawaii a few years ago and killed a
    number of Japanese school children on an excursion trip. They miscalculated
    and surfaced under the boat. Perhaps in the future they can use the
    European Galileo for better accuracy of navigation :-).
    
    Aubrey.
    
    
    
    At 17:02 17-11-03, Philip Ouvry wrote:
    >This thread has been going on for a long while!
    >
    >A fibreglass hull makes an excellent sound box magnifying many underwater
    >noises.   If you have a submarine operating its sonar in your vicinity you
    >can hear it quite well.   As an aside on one occasion cruising quietly in
    >open water we found ourselves in the middle of a naval anti-submarine
    >warfare exercise.   Happening to glance down in the water we saw a submarine
    >right below us using us as a cover to avoid detection.   Later in the
    >exercise the submarine did an emergency surface about 60 metres away coming
    >out of the water at an angle of 30 degrees.   Fortunately we were not in the
    >way!
    >
    >Philip Ouvry
    
    
    

       
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