Abstract: The boat is essentially mono hulled in its appearance but has the capacity wherein the lower and outer sections of the hull can be hinged out of a concave recess under the main deck and behind the full bow of the boat. The front of the hinging sections are curved to a point and graduated longitudinally to allow a bowlike profile at any given point as the sections are swung upward and away from the core of the boat. When the hinging sections are semi extended a full twin hulled operation can be achieved and when further extended a true triple hulled operation can be achieved with essentially three “bows” cutting the water. When fully extended the walls of the hinging sections come up to horizontal and also provide the benefit of extra deck space.