A quadrimaran is a four hulled watercraft. Its defining factor is four hulls, placing it within the multihull category. It has one more hull than a trimaran, and one less hull than a pentamaran. Conventional western vessels, by contrast, are monohulls.
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- William Hockberger (2007). "Quadrimaran Ferries - High Speed with Shallow Draft" (PDF). Transportation Research Board Annual Meeting. Retrieved January 2015.
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