Trimaran sailplan. They contribute to drag when heavily immersed, and their level of immersion indicates when to reef. Two types of trimaran exist: the regular trimaran and the open trimaran, which features a trampoline between the hulls instead of plating. Trimarans have a number of advantages over comparable monohulls (conventional, single-hulled sailboats). Given two boats of the same length, the trimaran has a shallower draft, a wider beam, less wetted area, and is able to fly more sail area. In addition, because of the righting moment provided by the wide beam, trimarans do not need the weighted keel that is required
Trimaran hull". The outrigger hulls are "floats". The structures between the main hull and the floats are called the "wings" and the structural portions thereof are "beams"). In cruising trimarans the wings are solid and cabin accommodation extends over them, while in racing trimarans accommodation is limited to the main hull and the wings are open sheets of netting. In comparison to outrigger canoes, trimarans typically feature a sail (or engine) and are not primarily designed to be paddled. Trimarans are typically significantly wider. In addition, trimaran floats are much more buoyant than those of outrigger canoes to support a large