Trimaran - is a multihull boat that comprises a main hull and two smaller outrigger hulls which are attached to the main hull with lateral beams. Trimarans are most commonly yachts designed for pleasure, recreation or racing, but there are a few trimaran ferries and warships. In recent years, some of the most creative minds in yacht production have turned their full attention to trimarans.
  Though offering practical advantages over single-hull yachts, such as improved stability and fuel efficiency, trimarans also give yacht designers and naval architects a radically different canvas to work with. The resulting futuristic three - hulled designs - some of which may never actually make it to production - certainly spark the imagination.