Abstract: The present disclosure provides a wave-dissipating and wave-resisting integrated floating photovoltaic device capable of resisting severe sea conditions, comprising at least one floating photovoltaic unit, wherein the floating photovoltaic units are connected through connecting pieces, and the connecting pieces can avoid collision between the floating photovoltaic units. The floating photovoltaic unit comprises a floating system, photovoltaic systems and a walkway system; the floating system is used for supporting the photovoltaic systems and bearing wave load impact; the photovoltaic systems are photovoltaic power generation systems; the walkway system is arranged between the photovoltaic systems, and the walkway system provides convenience for later maintenance of the floating photovoltaic device.

Abstract: 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.

Abstract: There is provided a mounting assembly for a marine vessel having a pair of stern-mounted propulsion units. The assembly includes a pair of angle-setting members which forwardly angle the propulsion units towards a bow of the marine vessel when each propulsion unit is at the center of its total steering range. Each propulsion unit has a line of action of its propulsion force. The lines of action of the propulsion units intersect each other between a center of rotation of the marine vessel and a stern of the marine vessel when the propulsion units are steered forwardly towards each other.

Abstract: This invention is a two tunnel, four hull, trimaran-catamaran, flying boat that incorporates hydrodynamic planing surfaces with the benefit of aerodynamic lift. A boat that accommodates two people, such that, the pilot and passenger sit back to back in a low, semi-reclining position in a distinctive fuselage along the centerline, situated between and below a wing structure on either side, and thus forming the mid-structure of a trimaran. This fuselage flys in air above the water line. A streamlined canopy structure is located overhead and above the wing. The horizontal wing structure forms two tunnels below, each on either side of the centerline fuselage, providing a chamber for aerodynamic lift. Outboard of the wings are the catamaran hull arrangements with two hulls forward of amidship in parallel, followed in tandem by two hulls aft. The four hulls provide hydrodynamic lift.

Abstract: A watercraft device includes a central body and of two lateral hulls. Each lateral hull is connected to a central body by at least one connecting arm, so that the central body is in a raised position relative to two lateral hulls, the connecting arms having a given inclination to the vertical plane of the watercraft device. The two lateral arms and the central body are oriented with their longitudinal axes, i.e. the bow to stern axes, parallel to each other. Each of the two lateral hulls includes a body having a substantially cylindrical symmetry, with an annular constriction between the fore and the aft main sections of the lateral hulls.

Abstract: A vessel (30) comprising a hull (15) having an apparent centre of pitch (23) located at a position between about 10% and 35% of the length of the vessel (10) measured from the aftermost point (17) of the vessel on the design waterline. The hull (15) may be bare, or alternatively may be fitted with a damping system (31) located forwardly to provide damping forces to reduce the vertical motion at the bow and hence the vertical accelerations. In one arrangement, the vessel (10) may comprise a single hull vessel. In another arrangement, the vessel (10) may comprise a multi-hulled vessel.

Abstract: A vessel (10) comprising a hull (15) having a the Longitudinal Centre of Flotation (LCF) at the design load waterline (25) at rest with a value of less than about 35% of the vessel waterline length measured from the aftermost point (19) of the vessel waterline. The design vessel speed at design load waterline is at or above Froude Number of 0.45. The hull (15) has a length-to-beam ratio on the design waterline of greater than about 8.0. The Longitudinal Centre of Buoyancy (LCB) is between about 30% and 45% of the vessel waterline length measured from the aftermost point (19) of the vessel waterline (25). In one arrangement, the vessel (10) may comprise a single hull vessel. In another arrangement, the vessel (10) may comprise a multi-hulled vessel.

Abstract: A watercraft hull has a flat pad keel whose beam tapers towards the bow and at the transom is 15% to 25% of the beam at its chines. The hull is symmetric about its centerline, has a fine entry bow, and a pair of hard chines. Between the pad keel and the chines the hull has at least one pair of generally flat longitudinal steps having approximately 0 degrees of deadrise forming planing surfaces symmetrically about the hull centerline. The hull also includes at least one pair of ultra high deadrise panels, outboard of and adjacent to the pad keel, symmetrically about the hull centerline, and extending to the flat planing panels above them. The ultra high deadrise panels have a deadrise approximately 50 degrees. Additional flat planing surface structures having approximately 0° deadrise are installed longitudinally on the hull between the pad keel and the hard chine.

Abstract: A hull (1) for a marine vessel (10) comprising an elongate body (2) that tapers outwardly from a foremost location, the bow (3), and tapers inwardly toward the aft (4) such that the aft (4) of the body (2) is significantly reduced in profile with respect to a point in the hull at which the inward taper commences.

Abstract: A pontoon boat having enhanced handling characteristics includes a deck, a central pontoon mounted to said deck, two outer pontoons mounted to said deck on respective opposite sides of said central pontoon, and a motor, wherein the central pontoon extends below the outer pontoons to create a V-shaped hull, and the motor is capable of causing said center and outer pontoons to plane during normal operation.

Abstract: The catamaran hull includes a pair of substantially parallel separate hulls, connected by an intermediate hull portion, wherein only one of the separate hulls includes a propulsion assembly. Each hull is asymmetric, but differently configured, such that the off-center thrust created by the propulsion assembly in the one hull is substantially offset by the turning force created by the difference in the two asymmetric hull shapes.

Abstract: The invention relates to an armed stealth surface vessel (1) comprising a hull (2), a deck (5, 6) and superstructures (3). The inventive vessel is equipped with sensors, transmitters, arms and, optionally, handling means. The invention is characterized in that the outer casing (4) of the deadworks comprises walls which are all inclined inwards such that the outer faces thereof are oriented upwards and form an angle that is greater than or equal to 20° with the vertical at least above a line located 5 m above the waterline and, along at least 50% of the length of the vessel, above a line located less than one meter above the waterline. The invention is also characterized in that that the essentially-vertical joint lines between two adjacent walls are inclined inwards and form an angle of more than 20° with the vertical. The invention is further characterized in that the sensors and transmitters, the arms and the handling means are concealed or can be concealed in or under the outer casing of the deadworks.

Abstract: A high-speed, multi-hull boat that includes at least three hulls (3, 4), and in which, with the boat being considered to be floating and stationary on a stretch of calm water (1), the cross sectional areas (Si) of the space (18) formed between two walls (19) of opposing hulls, the surface of the water (1) and the bottom face (21) of the deck (2) facing this water surface, decrease from the bow to the stern. According to the invention, with the boat being considered to be out of the water, the heights (H) of the hulls between the same horizontal reference (R) and the lowest part (B) of their bottoms, are greater for the outer hulls (4) than for the central hulls (3) in the same cross-sectional plane.

Abstract: A pontoon boat having enhanced handling characteristics includes a deck, a central pontoon mounted to said deck, two outer pontoons mounted to said deck on respective opposite sides of said central pontoon, and a motor, wherein the central pontoon extends below the outer pontoons to create a V-shaped hull, and the motor is capable of causing said center and outer pontoons to plane during normal operation.

Abstract: A liftboat with an improved hybrid hull which increases the speed and efficiency of the vessel and reduces the changes of damage should an accidental grounding occur with box beam construction, starboard and port catamaran hulls, a center barge hull, multiple legs, a jacking system for moving each upward and downward, and a retractable local bearing pad for each leg that engaged the seabed when in use. In addition, it proves a more streamlined housing for the retracted pads and a stronger integrated structure for the leg towers which guide and support the legs.

Abstract: A pontoon with an improved running surface and methods for construction the same are provided. The pontoon comprises an interior concave main running surface formed along the longitudinal centerline of the pontoon which is bounded by two sponsons, which in turn are bounded by two distal concave surfaces, or integrated lifting strakes. The associated methods provide a process for retrofitting prior art pontoons or constructing the pontoon to avoid the need for welds below the waterline of the pontoon. The pontoon provides improved pontoon boat performance by maximizing lift and minimizing leakage. The pontoon also reduces construction costs by lowering the number of welds required to form a pontoon with lifting strakes.

Abstract: The catamaran hull includes a pair of substantially parallel separate hulls, connected by an intermediate hull portion, wherein only one of the separate hulls includes a propulsion assembly. Each hull is asymmetric, but differently configured, such that the off-center thrust created by the propulsion assembly in the one hull is substantially offset by the turning force created by the difference in the two asymmetric hull shapes.

Abstract: A pontoon with an improved running surface and methods for construction the same are provided. The pontoon comprises an interior concave main running surface formed along the longitudinal centerline of the pontoon which is bounded by two sponsons, which in turn are bounded by two distal concave surfaces, or integrated lifting strakes. The associated methods provide a process for retrofitting prior art pontoons or constructing the pontoon to avoid the need for welds below the waterline of the pontoon. The pontoon provides improved pontoon boat performance by maximizing lift and minimizing leakage. The pontoon also reduces construction costs by lowering the number of welds required to form a pontoon with lifting strakes.

Abstract: The invention is directed to a watercraft hull design that comprises a hull having a bow, stern, top, and bottom. A wedge-shaped wave spreading system is located at a forward portion of the craft. The wave-contacting surface planes of the wave spreading system are positioned substantially perpendicular to the plane of smooth water. The bottom edge of the wave spreading system is positioned near the level of smooth water when the watercraft is at cruising speed. The wave spreading system has a forward apex which forms a substantially perpendicular or vertical leading wedge to the plane of water. Since the apex and planes of the wave spreader are substantially perpendicular to the water, oncoming waves encountered by the wave spreader will tend to be deflected horizontally. Accordingly, the watercraft will more easily “cut through” waves instead of riding over them. Located rearwardly of the wave spreader, an internal hull prow is spaced from the wave spreading system, creating an air space therebetween.

Abstract: An undershot waterwheel is described. The waterwheel has a rotational axis and paddles rotatable about the rotational axis. At least one paddle comprises a blade that is curved when viewed parallel to the rotational axis. Optionally, the waterwheel may be mounted on a watercraft.

Abstract: A planing pontoon hull is described including a bow section with separate steep and shallow bow planes separated by left and right displacement guides extending upward from a planar bottom. Forward bow angle, steep deflections angles, displacement angles, and shallow planing angles are described for water movement over a range of water speeds and depths.

Abstract: A high-speed, multi-hull boat that includes at least three hulls (3, 4), and in which, with the boat being considered to be floating and stationary on a stretch of calm water (1), the cross sectional areas (Si) of the space (18) formed between two walls (19) of opposing hulls, the surface of the water (1) and the bottom face (21) of the deck (2) facing this water surface, decrease from the bow to the stern. According to the invention, with the boat being considered to be out of the water, the heights (H) of the hulls between the same horizontal reference (R) and the lowest part (B) of their bottoms, are greater for the outer hulls (4) than for the central hulls (3) in the same cross-sectional plane.

Abstract: A catamaran-like one piece molded stable watercraft with sloping sides and a graduated sloping channel for supporting an individual and up to 600 pounds of gear without flipping and wherein the watercraft has a draft of no more than 6 inches fully loaded and less than 3 inches with 170 pounds of weight.

Abstract: The invention is directed to a watercraft hull design that comprises a hull having a bow, stem, top, and bottom. A wedge-shaped wave spreading system is located at a forward portion of the craft. The wave-contacting surface planes of the wave spreading system are positioned substantially perpendicular to the plane of smooth water. The bottom edge of the wave spreading system is positioned near the level of smooth water when the watercraft is at cruising speed. The wave spreading system has a forward apex which forms a substantially perpendicular or vertical leading wedge to the plane of water. Since the apex and planes of the wave spreader are substantially perpendicular to the water, oncoming waves encountered by the wave spreader will tend to be deflected horizontally. Accordingly, the watercraft will more easily “cut through” waves instead of riding over them. Located rearwardly of the wave spreader, an internal hull prow is spaced from the wave spreading system, creating an air space therebetween.

Abstract: In one aspect of the invention, a vessel has a liquid-plane greater than one meter2/(metric ton)2/3 and includes a hull having a total length and a plurality of hull portions each having a length that is less than the total length. Each hull portion buoys the vessel. Each hull portion also protrudes above the liquid-line and includes a wetted area that does not contact the wetted areas of other hull portions when the boat accelerates through Froude numbers between 0.4 and 0.6. In addition, each hull portion includes a cross-sectional area having a perimeter defined by the edge of the wetted area and having an area defined by a plane that intersects the hull portion at the perimeter. The vessel's liquid-plane is the sum of each hull portion's cross-sectional area divided by the cube root of the square of the weight of the boat is at least one.

Abstract: A hull of a ship has a front hull part (10) with a deep V-shape contour having an angle gradually increasing from fore to aft to become 180 degrees in a rear hull part (14) with chines extending according to a side hull contour. The chines, starting from the stern, have a lower edge which is situated under the waterline (20) astern of the midship cross section and then raises such that they are radiused with the front hull part (10).

Abstract: An individual propelled catamaran watercraft with sloping sides and sloping channel adapted for supporting an individual without flipping and having a draft of no more than 3 inches.

Abstract: A large-waterplane-area ship operable to efficiently operate at a high-Froude velocity. In one embodiment of the invention, a large-waterplane-area ship includes a hull structure having a plurality of exclusive hull portions protruding from a main body of the hull structure. Each hull portion has a length shorter than the length of the main body and each hull portion has a buoyancy wherein the combined buoyancy of each hull portion is sufficient to support the main body above a waterline. As such, each hull portion acts independently and exclusively of other hull portions with respect to the effects of wave drag. Therefore, the ship overcomes wave drag at lower velocities.

Abstract: A marine catamaran platform especially advantageous for small boats (in the three meter range) in which two substantially identical hulls are surmounted by superstructures that are joined by arced beams that lie in a plane that forms an acute angle of between 30° and 60° with a plane common to the hulls.

Abstract: A multi-hull design suitable for various size boats ranging from racing craft to the large military ships. The apparatus is a polygonal boat hull apparatus having a bow and stern wave penetrating feature. The hull is made from triangular-shaped essentially flat panels which provides for substantially stability and strength. The hull can be made in various configurations ranging from catamarans, triamarans to multiple hull designs in accordance with the projected use of the vessel. The invention includes a drive pod system having a plurality of propulsion units. The invention also provides at least one hydropneumatic cylinder that adjusts the angle of attack of the propulsion unit. The hull may also be rigged as a multi-masted sailing vessel.

Abstract: A pontoon includes an elongated body of non-uniform diameter. The body is dimensioned and configured to provide a non-uniform buoyant force to a boat along at least a majority of a length of a boat. Also provided is a pontoon boat including pontoons as described above. The pontoon boat also includes a deck having an upper surface and a lower surface. The pontoons are attached to the lower surface of the deck.

Abstract: A sea friendly hull shape invention provides the benefit of water ballast without the penalty of carrying that ballast. There are open ballast passages which can be in the shape of pipes, or other similar shapes, through which water flows continuously when the vessel is in motion or at rest. The passages are connected to a main hull by thin wave piercing hull shapes. As a wave passes under the vessel, there is little area presented to increase the hull's displacement and any hull movement up or down will be countered by the force of the water going through the ballast passages. In this manner there is a reaction similar to one offered by static ballast, but without the power demand needed to carry it.

Abstract: The technical field of the invention is that of ship building, more particularly making ship hulls. A monohull with stern stabilizers, also known as a pseudo-trimaran, for constituting a very high-speed ship comprises a central float (1) and two shorter side floats (2) situated towards the stern of the central float (1) and connected thereto by faired link arms (5); according to the invention, the underwater portions of the three floats (1, 2) are always immersed at least in part and regardless of speed, with the side floats (2) having tiltable underwater foils (3) and with the fineness coefficients of the three floats lying in the range 0.25 to 0.35, with ratios of length over beam lying in the range 12 to 20, and with the ratio of the length of the central float over the length of the side floats lying in the range 2.5 to 4.5.