A watercraft includes: a watercraft body; a pontoon frame system coupled with the watercraft body, the pontoon frame system including: a plurality of pontoons spaced apart from one another; and a chassis coupled with and at least partially supporting the watercraft body, the chassis supported by and coupling together the plurality of pontoons, the chassis including a cross-hatched assembly.

A watercraft includes: a watercraft body; and a pontoon frame system coupled with the watercraft body, the pontoon frame system including: a plurality of pontoons spaced apart from one another and including a forward end, a rearward end, a first outboard pontoon, and a second outboard pontoon; and a chassis coupled with and at least partially supporting the watercraft body, the chassis supported by and coupling together the plurality of pontoons, the chassis including a composite body coupled with the first outboard pontoon and the second outboard pontoon at the forward end and the rearward end.

A pontoon boat is provided that includes at least two pontoons running longitudinally beneath the boat and providing buoyancy thereto; a deck framework mounted above and connected to the pontoons; a deck mounted on the deck framework; a recessed deck portion extending downwardly through the deck and the deck framework, the recessed deck portion forming a cavity into the deck including a bottom and side walls forming a basin extending into and beneath the deck; and at least one seat adjacent the recessed deck portion and mounted to the deck.

A floating carrier device is configured to support at least one solar element floating on a water body, in particular an inland water body, with at least one floating body and with a carrier structure which is coupled with the floating body and is configured to transfer a support force of the at least one solar element to the at least one floating body.

A method of controlling a plurality of marine drives on a multi-hull marine vessel includes determining, based on steering information, that the multi-hull marine vessel is entering a turn and then receiving a running trim position for each marine drive. A trim position of at least a portion of the plurality of marine drives is then adjusted from each respective running trim position so as to induce roll of the multi-hull marine vessel during the turn.

The present invention relates generally to underwater wings for providing lift to boats. More particularly, exemplary embodiments of the present invention include a pair of underwater wings that attach to the hulls of a pontoon. The purpose of the wings is to provide a designated amount of lift to reduce drag and improve performance of the watercraft. This is different from a traditional hydrofoil, which is designed to lift a boat completely out of the water. Ideally, the wings are connected to the deck of the pontoon boat via adjustable mounts that allow the wings to be raised or lowered in the water to adjust the amount of drag.

A modular flotation device comprises a first elongated rigid pontoon module comprising a first pontoon section and a second pontoon section, a second elongated rigid pontoon module comprising a third pontoon section and a fourth pontoon section, and an intermediate frame module comprising longitudinal members extending substantially parallel to the first and second elongated rigid pontoon modules, and lateral members extending substantially perpendicular to the first and second elongated rigid pontoon modules. The first, second, third, and fourth pontoon sections can comprise identical connection profiles and are interchangeable with one another.

Embodiments include a retrofit pontoon system including a pontoon, the pontoon having a pontoon body defining a first cavity, the pontoon body having a first aperture; a retrofit assembly, the retrofit assembly including a selectively fillable container sized to pass through the first aperture; and a pump. The pump is operably coupled with the selectively fillable container such that operation of the pump selectively fills and drains water from the selectively fillable container, wherein filling the selectively fillable container lowers the profile of the pontoon in the water and emptying the selectively fillable container raises the profile of the pontoon in the water.

The present invention refers to a hybrid vessel with a ballast system in which the position of the cabin (102) is changed vertically, from emerged to submerged and vice versa, according to the decision of its operator.

Thus, the present invention describes a hybrid vessel with ballast water system comprising at least one cabin (102) and at least one main tank (101) of ballast water, and the tank (101) is connected directly to the CAB (102) or partially above the water level.

A catamaran having two parallel symmetrical hulls of equal size spaced apart with a superstructure lower deck extending from an outer edge of the first hull to an outer edge of the second hull. The lower deck is positioned above the static waterline and provides a single, constant, flush elevation height across the entire length and breadth of the vessel, with the placement of control and propulsion machinery in the hulls. The improved catamaran has an increased freeboard, increased gross tonnage, and decreased design pressures on the superstructure scantlings of the catamaran deck as compared to a conventional catamaran having a lower deck mounted beneath the static waterline, or accommodations added to the hulls.