Multihull
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A multihull is a boat or ship with more than one hull, whereas a vessel with a single hull is a monohull. The most common multihulls are catamarans, and trimarans. There are other types, with four or
A Polynesian catamaran
Model of a wa, a single-outrigger vessel, from Woleai in the National Museum of Ethnology (Japan)
A 60' trimaran with high aspect fractional Bermuda rig
A catamaran ferry in Salem, Massachusetts
A small-waterplane-area twin hull, better known by the acronym SWATH, is a catamaran design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface a
Multihull
…arrangement allows good wave-piercing, while keeping a buoyant hydrodynamic hull beneath the waterplane. In a catamaran configuration this is called a small waterplane area twin hull, or SWATH. While SWATHs are stable in rough seas, they have the drawbacks, compared with other catamarans, of having a deeper draft, being more sensitive…
German Navy research ship Planet
German Federal Coast Guard customs cruiser Helgoland