An outboard motor boat is provided with a hull, a deck, at least one outboard motor and a bulwark. The hull includes a rear portion. The deck is provided on the hull. The at least one outboard motor is mounted to the rear portion of the hull. The bulwark is provided on the deck. The deck includes an aft deck in the rear of the deck. The aft deck includes a first part disposed forward of the outboard motor and a second part extending rearward with respect to the first part in a fore-to-aft direction. The first part is at least partially disposed in a non-overlapping location with respect to the outboard motor and the bulwark as viewed from a side view of the outboard motor boat. The second part extends along a lateral portion of the outboard motor.

A combination recreation vehicle and houseboat having an upper enclosure assembly and a lower floating chassis assembly with a floor system portion, wherein the upper and lower assemblies are movable between a retracted condition and an extended condition independently of each other.

The present application provides a 9-DOF wave compensation platform and operation method in marine engineering technology, comprising a 6-DOF parallel stabilization platform and a 3-DOF tandem boarding bridge. The 6-DOF parallel stabilization platform comprises a mounting base and a movable platform. Motion branch chains are arranged between the mounting base and the movable platform. The motion branch chain moves actively driven by a driving element, and a balancing cylinder system is further connected to the motion branch chain to offset the deadweight of the equipment. The 3-DOF tandem boarding bridge is installed on the movable platform. Through the balancing cylinder system, the driving load generated by component weight in the 9-DOF wave compensation platform is counterbalanced in advance, so that the driving load of the compensation platform during operation is significantly reduced, with lower total energy consumption of the system, and wider range of selectable driving elements.

A floatable barge, deployment system, and method of use. The work barge and dump barge are operable to be directly loaded from the water and deployed into the water from a roll off truck. The barges include a top deck supported by a hull with a mounting assembly that is operable to engage a deployment mechanism of a roll off truck. Optionally, the work barge may include retractable pontoons that rotate from a folded position to an open position, and the dump barge may include a permeable barrier. Both barges are configured to be transported on roadways and interstate commerce via a roll off truck.