Abstract: A pulley system for tying a boat to an anchor comprising a block and tackle assembly and a jammer. The block and tackle assembly has a plurality of pulleys arranged on a first bracket and a second bracket, and a first rope strung sequentially through each of the pulleys, ending with a last pulley. The jammer is coupled to the second bracket and has a channel and a jammer exit at the end of the channel. The last pulley, the channel, and the jammer exit are configured to create a tortuous path for the rope through the second bracket. The channel may be misaligned with the last pulley. A swivel and a rope clip may be coupled to the block and tackle assembly. The swivel is configured to rotate at least 360 in either direction. The rope clip is configured to allow for quick tightening of the pulley system.

Abstract: A directed thrust propulsion system has a central hub and at least three blades that extends outward at a rake angle between about 20 to 70 degrees. Each blade is shaped as a portion of a cylindrical surface, in which concave side forms the blade face and is facing in direction of thrust generated by rotating the hub. The convex side of the blades minimizes drag in the water that resists forward motion while the concave shape and tilted end portions directs the thrust inward toward the extension of the hub's principal axis rearward. The directed thrust propulsion system may be deployed on inboard and outboard motors for all manner of watercraft to increase efficiency above 10 knots speed.

Abstract: An inflatable watercraft of the kayak type including a hull including: a longitudinal bottom comprising a central longitudinal edge and two lateral longitudinal sides, so as to have a V-shaped cross section, the bottom comprising at least one inflatable shell, and a stiffening upper structure comprising two lateral longitudinal inflatable shells and at least one transverse element mounted between the two lateral inflatable shells, each lateral inflatable shell being mounted on one of the lateral longitudinal sides of the longitudinal bottom, in which each of the two lateral inflatable shells comprises two superimposed walls, each of said walls including a textile mat and being connected together by a multitude of connecting threads distributed over the entire surface of said mats while forming a structure suited to be inflated to a pressure capable of stiffening said structure.

Abstract: A hollow structural element of a wind energy plant, in particular an offshore wind energy plant which includes a hollow structural element, and a cable arrangement extending along the hollow structural element. A shading element is arranged on the hollow structural element at a distance from the cable arrangement.

Abstract: Offshore terminal apparatus which in various examples comprises a floating storage vessel which is spread-moored in fixed heading orientation to a seabed offshore by spread mooring lines, the floating storage vessel comprising a hull having bow and stern ends and which at either or both the bow end and the stern end is fitted with an extension section and includes coupling means on the extension section to couple spread mooring lines to the floating storage vessel.

Abstract: A seat assembly includes: a backrest having a cushion surface formed on a first side of the backrest and support surface formed on a second side of the backrest; a first track assembly located along a first side of the backrest and a second track assembly located along a second side of the backrest; and a plurality of guide pins extending from the backrest into the first track assembly and the second track assembly such that the backrest is movable along the first track assembly and the second track assembly on the plurality of guide pins between a stowed position and a deployed position.

Abstract: Systems and methods to provide an exterior stringer system inflatable paddleboard. The exterior stringer system inflatable paddleboard maintains the benefits of a baseline inflatable paddleboard while providing increased strength, such as increased rigidity or stiffness. The exterior stringer system is positioned on the bottom surface of a baseline inflatable paddleboard. In one embodiment, the exterior stringer system is formed by a set of longitudinal stringers positioned on opposite sides of an inflatable paddleboard and a set of transverse stringers arranged in an X configuration between the longitudinal stringers.

Abstract: A battery enclosure for a personal watercraft is provided. Different configurations of the battery enclosure are disclosed, as well as different arrangements of the battery enclosure within the personal watercraft and with respect to other features of the personal watercraft. According to one embodiment, a personal watercraft includes a deck and a hull defining an interior volume. An electric motor is housed within the interior volume, the electric motor being operable to rotate a drive shaft. A battery pack having a battery enclosure housing one or more batteries is also positioned within the interior volume. A portion of at least one battery of the one or more batteries is positioned vertically above the drive shaft.

Abstract: An assembly for a watercraft according to an example of the present disclosure includes, among other things, a flotation device including an elongated slot and a mount that has first and second flanges extending outwardly from a bracket body. The first flange is configured to be mechanically attached to a frame, and the second flange is slideably received in the slot to secure the flotation device. A method of assembly for a watercraft is also disclosed.

Abstract: A boat in which at least a portion of at least one of the port side and the starboard side of the hull is moveable between a first position and a second position. In the first position the moveable portion forms a generally upright portion of the port or starboard side of the hull, and, in the second position, the moveable portion forms a generally horizontal deck surface. A walkway connects a seating area within the boat to an area aft of the seating area, and at least a portion of the walkway is adjacent to the moveable portion of the port or starboard side. A first seat is positioned adjacent to at least a portion of the walkway and a removable seat is configured to be positioned over the walkway and adjacent to the first seat.

Abstract: In one example, a watercraft includes a hull that defines a well extending through a bottom of the hull, and the hull defines an upper tray recess and a lower tray recess. A pedal-drive mechanism is connected to the hull and configured to assume both a stowed position and a deployed position, and a portion of the pedal-drive mechanism extends through the well when the pedal-drive mechanism is in the deployed position. A pedal-drive housing and attachment mechanism is provided that includes a tray configured to move between a forward position in which part of the tray resides in the lower tray recess, and an aft position in which part of the tray resides in the upper tray recess.

Abstract: Methods and systems for operating a stable platform in a far-offshore deep-sea environment. The platform can advantageously be a wind power generation station. A structural framework carries (for example) the wind turbine in an elevated position. Multiple points on the floating structure are connected both to a surface float and to a deep mass (e.g. an enclosed volume of seawater).

Abstract: A pontoon boat includes port and starboard pontoons and cross members connecting the pontoons. A shock absorber may be installed at each point of connection of the pontoons to the cross members. A cross member may be embodied as a double-webbed beam having first and second parallel flanges and first and second webs disposed between and connected to the flanges. Each pontoon may include a two-stage lifting strake having a first surface and a second surface inclined from the first surface.

Abstract: A floating vessel comprising: (a) opposing hulls; (b) a beam extending between and interconnecting the opposing hulls; and (c) a deck supported by the beam and positioned between the opposing hulls, wherein the floating vessel is modular and configured for easy assembly, disassembly, or both.

Abstract: A watercraft and a marine engine assembly for mounting to a watercraft are disclosed. The marine engine assembly includes an engine unit including: an engine unit housing being sealed such that water in which the engine unit housing is immersed is impeded from entering the engine unit housing; an engine in the housing; and an air intake assembly in the engine unit housing which forms a conduit between an exterior of the engine unit housing and the engine, the air intake assembly defining an inlet fluidly communicating with exterior air, the engine unit housing defining at least one aperture aligned with the inlet, the air intake assembly defining at least one outlet fluidly connected with the engine intake, the air intake assembly being sealed such that surrounding fluids within the engine unit housing are impeded from entering the air intake assembly; and a propulsion device operatively connected to the engine.

Abstract: A boat mooring system utilizing a cylinder having an internal spring-like mechanism that allows a retaining rope to lengthen or shorten automatically to adjust for rising tide or high wind to retain a boat at a safe distance from a dock or pier.

Abstract: A watercraft includes at least one floating member, a central frame supported thereon, first and second foot platforms, and first and second handlebars. The first and second handlebars define elongated configurations and include grasping end portions, intermediate portions pivotably coupled to the central frame, and base end portions pivotably coupled to first end portions of the respective first and second foot platforms. A propulsion system includes an axle assembly, first and second rotating arms, and first and second oars. The rotating arms are fixed relative to one another, pivotably coupled about the axle assembly at first ends, and pivotably coupled to second end portions of the foot platforms at second ends. The oars are engaged with and extend from the foot platforms. The propulsion system cycles the oars approximately 180 degrees out of phase to propel the watercraft while maintaining substantially perpendicular orientation of the oars.

Abstract: Disclosed are embodiments of a table assembly for a boat docked near a landing. The table assembly consists of three essential components: (1) a table having an upper surface and an underside surface; and (2) a leveling mechanism secured to the underside surface. In one embodiment, a third essential component is: (3A) a pair of hooks secured to the leveling mechanism. In another embodiment, a third essential component is: (3B) a pair of claws secured to the table underside surface.

Abstract: A personal watercraft is disclosed including a flotation portion, a strut extending from the flotation portion, and a motor pod is disposed along the strut with an electric motor operably coupled to a driveshaft. A hydrojet unit is removably attached to the motor pod and includes an inlet portion removably attached to the motor pod and a substantially cylindrical housing. The inlet portion includes a substantially conical motor interface with a shaft through-hole for receiving the driveshaft therein, one or more fins extending outwardly from the conical motor interface, and at least one ring encircling the conical motor interface and connecting to each of the one or more fins for inhibiting objects from passing through the inlet region. The housing defines a fluid flow path to an outlet portion. The hydrojet unit includes an impeller coupled to the driveshaft and a stator disposed within the housing.

Abstract: A watercraft according to the present disclosure may include an outer hull that defines an interior or hull cavity, and a ballast system located within the hull cavity. The ballast system may include at least three ballast tanks longitudinally distributed along the hull cavity, and each of the tanks being configured to be independently operated enabling selective entrapment of ballast at three or more different longitudinal locations to enable an intentional shifting of the longitudinal center of gravity (LCG) of the watercraft relative to the design location of the LCG of the watercraft. The watercraft may include at least a forward, a center, and an aft ballast tank, and in some embodiments, additional tanks, in some cases in sponsons, may be included and/or one or more of the forward, center and aft tanks, may be further subdivided for additional active LCG control.