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 hydrofoil system provides lift to a motor-powered displacement hull without raising the hull out of the water. The hydrofoil system includes a pair of laterally opposed forward hydrofoil wings positioned respectively on the first pontoon and second pontoon forward a center of gravity of the hull. The forward hydrofoil wings extend laterally inboard and downwards towards each other. The hydrofoil system also includes a pair of laterally opposed aft hydrofoil wings positioned near the stern of the hull on the first pontoon and second pontoon respectively. The aft hydrofoil wings extend laterally inboard towards each other and have an upper surface with convex curvature that extends from the respective first pontoon or second pontoon to an inboard terminal end thereof.

Disclosed are a semi-submersible raft wind power generation unit and a construction method therefor. The raft wind power generation unit includes at least three floaters (12) and at least three wind turbines (21) configured to be placed on the floaters (12). The raft is configured to turn about a vertical axis and be fixed to a seabed (2) by a mooring line (36). A force resultant from an incoming wind load passes closely around the center of geometry of the raft, which is a distance away from the center of rotation of the raft so that a yaw moment about the center of rotation is created that rotates the raft until the force resultant passes through the center of geometry and center of rotation

The present invention relates to a trimaran and, more specifically, to a variable trimaran using natural power, the variable trimaran having an outer hull, which is capable of ensuring stability with respect to a center hull in the middle thereof, can be selectively expanded and contracted in the horizontal and vertical directions thereof, a sail unit, which uses wind power, and a solar power generation unit so as to enable efficient long-term sailing without the use of fossil fuel. To this end, a horizontal adjustment unit and a vertical adjustment unit are provided for adjusting the position of the outer hull, and the solar power generation unit and the wind power sailing unit are used such that the position of the outer hull can be freely adjusted with respect to the center hull and efficient long-term sailing is enabled without the supply of an oil energy source due to the use of sunlight and wind power as power sources.

A pontoon boat is provided that includes a deck and a plurality of pontoons running longitudinally beneath the deck and providing buoyancy to the pontoon boat. The plurality of pontoons include a multi-chine configuration that increases the stability of the pontoon boat and provides handling characteristics similar to that of a hulled boat. The plurality of pontoons may include two outer pontoons and a third pontoon positioned laterally intermediate the outer pontoons. The third pontoon may include a plurality of chines, and each of the outer pontoons may include at least one chine. At least a portion of each of the at least one chines of the outer pontoons may be positioned vertically below the plurality of chines of the third pontoon. The chines on the third pontoon may extend longitudinally further than each of the at least one chines of the outer pontoons.

A watercraft has an unsealed hull that is permeable such that, in use, water flows at least partly into an internal volume of the hull. The hull has at least one hull panel having inner and outer panel surfaces. At least one buoyant element is disposed within the internal volume of the hull. A conduit extends within the internal volume of the hull and defines at least one outlet for discharging water therethrough. An inlet connector of the conduit is configured to be connected to an external water source in order to supply water to the conduit. In response to the external water source being connected to the inlet connector, water flows through the conduit, out of the at least one outlet of the conduit, and onto at least a portion of at least one of the inner panel surface and the at least one buoyant element for rinsing thereof.

A multihull watercraft has at least three hulls extending longitudinally along the watercraft. The hulls at least partly define a port side tunnel and a starboard side tunnel therebetween. A port deflection device is configured to engage water in response to the watercraft leaning toward the port side when turning. The port deflection device is laterally aligned with the port side tunnel. A starboard deflection device is configured to engage water in response to the watercraft leaning toward the starboard side when turning. The starboard deflection device is laterally aligned with the starboard side tunnel. Each of the deflection devices includes an angled surface extending downwardly and rearwardly from an upper tunnel surface of a corresponding one of the tunnels. The angled surface is positioned to remain above a water line when the multihull watercraft is at rest on water.

A pontoon boat is provided that includes a deck and a plurality of pontoons running longitudinally beneath the deck and providing buoyancy to the pontoon boat. The plurality of pontoons include a multi-chine configuration that increases the stability of the pontoon boat and provides handling characteristics similar to that of a hulled boat. The plurality of pontoons may include two outer pontoons and a third pontoon positioned laterally intermediate the outer pontoons. The third pontoon may include a plurality of chines, and each of the outer pontoons may include at least one chine. At least a portion of each of the at least one chines of the outer pontoons may be positioned vertically below the plurality of chines of the third pontoon. The chines on the third pontoon may extend longitudinally further than each of the at least one chines of the outer pontoons.

A floating support structure for supporting a windmill system includes a windmill tower, a windmill nacelle, and windmill blades. The support structure includes an aft main section, a transverse main section, and a connecting flange. The aft main section includes a horizontal aft part with a first horizontal aft end and a second horizontal aft end, a vertical aft part with a first vertical aft end at least indirectly connected perpendicular to the first horizontal aft end and a second vertical aft end, and an aft damping structure connected to the second vertical aft end. The vertical and the horizontal aft parts are oriented in a common vertical aft plane. A horizontal cross sectional area of the aft damping structure is larger than a horizontal cross-sectional area of the second vertical aft end. The transverse main section includes a horizontal transverse part with a first horizontal transverse end and a second horizontal transverse end, two vertical transverse parts, each having a first vertical transverse end and a second vertical transverse end, wherein the first vertical transverse ends of the vertical transverse parts are at least indirectly connected perpendicular to the first and second horizontal transverse ends, and two transverse damping structures connected to the second vertical transverse ends of the respective two vertical transverse parts. The two vertical transverse parts and the horizontal transverse part are oriented in a common vertical transverse plane. A horizontal cross sectional area of each of the transverse damping structures is larger than a horizontal cross sectional area of the second vertical transverse end. The connecting flange is for connecting a coupling end of the windmill tower distal to the windmill nacelle vertically onto the floating support structure. The second horizontal aft end of the aft main section is connected to the horizontal transverse part of the transverse main section such that the vertical aft plane is oriented perpendicular to the vertical transverse plane.

A floating platform, the platform including a plurality of floating chambers, wherein each chamber comprises a plurality of shipping containers, each container having a door at a first end and an opposing panel at a second end, the containers placed one above the other such that a door of one container is connected to an opposing panel of another container.