Trimaran Trimaran A trimaran (or double-outrigger) is a multihull boat that comprises a main hull and two smaller outrigger hulls (or "floats") which are attached to the main hull with lateral beams. Most trimarans are sailing yachts designed for recreation or racing; others are ferries or warships. The word "trimaran" is a portmanteau of "Tri" and "(Cata)maran". It is thought to have been invented by Victor Tchetchet, a pioneering, Ukrainian-born modern multihull designer. The first trimarans were developed by the Austronesian people and are still widely used today by traditional fishermen in maritime Southeast Asia, Madagascar, Micronesia, and Polynesia. Some of
Junk rig running rigging which pulls up the junk sail are: The running rigging which pulls down on the junk sail are: The running rigging that sets or trims the junk sail (controls the angle of attack relative to the direction of the wind) is the "sheet". On a traditional Chinese junk rig, the sail is controlled by "sheetlets"—small sheet lines running from the battens to blocks that in turn are on lines running through a "euphroe," a long piece of wood with holes in it. This helps maintain uniform tension in each panel of the sail. Western ship designers Tom Colvin,