A catamaran which has a centre tunnel, the opposite sides (105a, 105b) of which form asymmetrical pontoons, which are mirror images of each other, and which pontoons have buoyancy, which has been adapted so that when the catamaran moves in water, the centre tunnel functions as a combined water and air tunnel. When the catamaran is stationary in water, the ceiling (108) of the centre tunnel is in water. The ceiling of the centre tunnel further curves in a cylindrically convex manner downwards when going from the bow (116) to the direction of the stern (118) only after an essentially horizontal portion (401) of a distance (d), which essentially horizontal portion is located between the pontoons.

A workboat includes at least two hulls, at least one work tool, a body, and at least one carrier frame which is fastened on the body, between a bow and a stern of the workboat. The at least one work tool is arranged on the at least one carrier frame. A range of movement of at least one of the at least one carrier frame and the at least one work tool, in a transverse direction of the workboat, is located centrally with respect to the workboat and between the at least two hulls which extend in a longitudinal direction. In an event of a position change during a work procedure of the at least one work tool, a position of a center of gravity of the workboat varies by at most 15% with respect to a boat length of the workboat.

A watercraft includes a deck, a hull supporting the deck, and a barrier structure. The barrier structure includes: a frame connected to at least one of the deck and the hull and at least partially surrounding a portion of the deck; and a pliable sheet wall connected to the frame. The frame includes an upper portion including a rail for grabbing by a user's hand; and a lower portion connected to the at least one of the deck and the hull. The lower portion and the upper portion are connected to one another. The pliable sheet wall is stretched across at least a portion of the frame so as to extend between the upper and lower portions of the frame. A barrier structure is also contemplated.

There is provided a renewable power generation farm for fishing work, the farm comprising: a plurality of mutually connected floating ships, wherein each ship is configured to generate an energy using solar and wind power, wherein each ship comprises: a main elongate floating structure; a wind-based energy generation device secured to the main elongate floating structure; a transverse beam extending perpendicularly to a longitudinal direction of the main structure; a longitudinal beam extending in a parallel manner to the longitudinal direction of the main structure; connection beams connecting both opposing ends of the transverse beam and both opposing ends of the longitudinal beam respectively; auxiliary pillars vertically extending through the both ends of the transverse beam and the longitudinal beam respectively; solar-based energy generation devices disposed at top ends of the auxiliary pillars respectively; and auxiliary elongate floating structures disposed at bottom ends of the auxiliary pillars passing through the ends of the transverse beam.

A multi-hull variable aspect surf rescue boat is provided, which can support and contain occupant(s) and cargo and can be readjusted in shape and size to vary the boat's length overall (LOA), beam on center (BOC), the LOA/BOC ratio or OAR, thereby changing the boat's attitude, center of buoyancy and center of gravity without changing the boat's components or weight. The boat includes a frame assembly comprised of a centerline tube and three or more radiating, extendable and retractable telescoping tubes which intersect at a center line of the boat. A respective starling control assembly is attached to each telescoping tube, providing buoyancy to the boat. The frame assembly carries a platform for carrying the occupant(s) and cargo, and a means of propulsion for transporting the boat in surf or turbulent waterways.

A modular multipurpose offshore operation platform comprises a floating structure having a lower portion submerged below the surface of the sea, and a platform structure provided at an upper surface of the floating structure. An integrated work platform comprises at least two modular multipurpose offshore operation platforms. Framework structures of two adjacent operation platforms are detachably and fixedly connected, and floor boards of the operation platforms collectively form a deck. A transportation method transports goods to the platform by means of a hoist, and a hoist bracket with a rotating roller. The platform can achieve standardized production, and is flexible and has multiple functions.

An apparatus and methods according to the present invention provides a human powered catamaran-styled watercraft and methods of configuring and operating the watercraft. The watercraft generally comprises at least one hull in communication with a folding collapsible frame, wherein in the frame comprises a center rack pivotally joining hulls of hull sets to provide for common pivoting of the hulls during articulation of the watercraft, thereby the hulls and frame are in further communication through a at least one pivot pad which provides for slidable pivoting of the hulls during articulation of the watercraft. A method of folding and reversibly extending the watercraft to provide for optimized storage is provided. A method of operation of the watercraft to provide for articulation of the watercraft is provided.

A multihull stepped planing boat with multiple independent elastic planing surfaces includes: a main hull, X front planing sub-hulls arranged side by side under a front portion of the main hull, and Y rear planing sub-hull arranged side by side under a rear portion of the main hull; wherein X and Y are positive integers, and 3≤X+Y≤8; the X front planing sub-hulls are equally spaced, and the Y rear planing sub-hulls are also equally spaced; there is a gap between the X front planing sub-hulls and the Y rear planing sub-hulls. The planing surface of the main hull is formed by a plurality of independent and spaced sub-planing surfaces. There is a certain elastic buffer space between each sub-planing surface and the main hull, and the shock absorption structures can absorb most of the shocks, thereby reducing the impact of water surface waves during high-speed navigation.

Disclosed herein is a broad-based ship that may be facilitated for landing and taking off of multiple aircraft, in accordance with some embodiments. Accordingly, the broad-based ship may include hulls, decks, and elevators. Further, the hulls may be configured to be floatably disposable in a water body. Further, the decks may be supported on the hulls. Further, the decks may include a flight deck and a lower deck. Further, the flight deck may include airstrips configured for allowing landing and taking off of aircraft on the airstrips simultaneously. Further, the elevators may be configured for transporting the aircraft between the lower deck and the flight deck simultaneously. Further, the transporting may include transferring the aircraft from the lower deck to the flight deck simultaneously. Further, the taking off of the aircraft simultaneously may be based on the transferring.

A method for constructing a floater for a floatable wind energy power plant includes providing a first pre-assembled part with at least one first connection arrangement, providing a second pre-assembled part with at least one second connection arrangement, arranging the at least one first connection arrangement of the first pre-assembled part proximate to the at least one second connection arrangement of the second pre-assembled part so as to form a connection site which includes at least a part of the at least one first connection arrangement and at least a part of the at least one second connection arrangement, sealingly arranging an enclosure about the connection site so as to seal the enclosure against an ingress of water, and connecting the first pre-assembled part and the second pre-assembled part at the connection site. Each of the first pre-assembled part and the second pre-assembled part are floatable.