an improved trimaran is provided that includes a car - like steering configuration and interchangeable floats or pontoon supports to vary the width of the trimaran , depending on whether the user wishes to sail the trimaran or transport it to another location by for example , loading it on a trailer . the trimaran includes a main section , multiple floats , a sail assembly and a set of beams that are used to removably position the floats a certain distance from the main section . the set of beams include beams of different lengths that enable the user to choose a subset of the set of beams to construct a trimaran of varying width . the center section includes a centerboard assembly , steering assembly , cockpit area , bulkhead areas and mast receiving area . the controls for the centerboard assembly and steering assembly are centrally located in the front portion of the cockpit area and the cockpit area is positioned between the bulkhead areas .