A multihull is a ship, vessel, craft or boat with more than one hull. Multihull ships (vessels, craft, boats) comprise a great variety of types, sizes and applications. A very specific sub-group of multihulls is the Small Waterplane Area (SWA) multihulls. A twin-hull version of this subgroup is commonly known as SWATH (Small-waterplane-area twin h... Found on http://en.wikipedia.org/wiki/Multihull
e.g. Tornado A boat with more than one hull. The Tornado has two hulls and is also known as a catamaran. Found on https://www.encyclo.co.uk/local/21233