catamaran question

Discussion in 'Boat Design' started by amateur mariner, Jul 29, 2009.

  1. amateur mariner
    Joined: Feb 2009
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    amateur mariner Junior Member

    I saw a video clip in which a big ship was on a catamaran and it took from the shallow water to deep one and then launched it.Can somebody tell me why it is so?the displacement of catamaran is not increased when the ship is on it equal to weight of both of them?
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