Abstract: A surfboard is provided, which may include a first air chamber, a second air chamber, and a partition arranged between the first air chamber and the second air chamber. The partition may comprise: a first connecting portion connected to a top wall of the first air chamber and to a top wall of the second air chamber; a second connecting portion connected to a bottom wall of the first air chamber and to a bottom wall of the second air chamber; and an intermediate portion extending between the first connecting portion and the second connecting portion.

Abstract: A boat drive hydraulic steering unit has a steering cylinder unit, pump and tank. The cylinder unit has a first chamber, piston and second chamber. The pump is connected to the first and second chambers by respective first and second line. The first chamber is connected to the tank via the first line arrangement when the second chamber is pressurized, by the first line arrangement having a first check valve which opens when the second line arrangement is pressurized. The second chamber is connected to the tank via the second line arrangement when the first chamber is pressurized, by the second line arrangement having a second check valve which opens when the first line arrangement is pressurized. The first and second line arrangements have respective first and second throttling devices acting in the direction of flow towards the tank. A boat drive may include the steering unit.

Abstract: A system and method for precise and consistent control of automated systems for deployment of boat fenders. The system comprises a computing device, one or more sensors, a motor controller, and a motor driver for operating motorized systems for deployment and/or retrieval of boat fenders. Various embodiments of the system use sensors and corresponding compensators to adjust the time of operation of a motor of the motorized system to ensure that the boat fender is deployed and/or retrieved to the proper height.

Abstract: A vessel operation system includes a propulsion apparatus mountable on a hull of a vessel and that includes a prime mover, a steering to change a steering angle of a thrust generated by the propulsion apparatus with respect to the hull, a speed sensor to detect a speed corresponding to a traveling speed of the vessel or a rotational speed of the prime mover, and a controller configured or programmed to control the steering so as to change a maximum value of the steering angle in accordance with a speed data based on the speed detected by the speed sensor.

Abstract: A device is presented that can be used as both a pad eye and as a fairlead independently and simultaneously while providing separation between the two modes of use. The device provides the option for multiple attachment points and multiple fairlead passages and reduces the need of requiring both a pad eye and additional hardware such as a pulley in applications such as the implementing of a jib sheet “in-hauler” system on a sailing vessel. Additionally, the device is configured in a symmetric manner so as to allow the device to be optionally joined and mated to a second but inverted such device allowing for the assembly of two such devices into a single combined unit. Such a combined configuration has the benefit of allowing for pad eye and fairlead functions to take place in a suspended location instead of being constrained to only a fixed surface.

Abstract: An outboard motor 10 includes a drive shaft 33, a propeller shaft 35, a worm wheel 66, and a worm 67. The drive shaft is connected to a drive motor 37 via a reduction unit 38. The propeller shaft is connected via a bevel gear unit to intersect the drive shaft. The worm wheel is disposed coaxially with the drive shaft and rotates to turn the propeller shaft around the drive shaft. The worm engages with the worm wheel and is connected to a steering motor. The worm has a torque receiving portion.

Abstract: A polyurethane composition includes a polyol component (A) including at least one polyol, a hardener component (B) including at least one polyisocyanate and glass microspheres along with the other optional additives and fillers. Further a method for applying polyurethane composition to create floors. The polyurethane composition is suitable as a flooring material.

Abstract: A surface/submersible water-craft, comprising: a hull, means for submerged propulsion provided in or on the hull, means for surface propulsion provided in or on the hull, floodable-on-submerging crew accommodation provided in the hull and a canopy arranged for closing the floodable crew accommodation for protecting the crew from water flow past the craft, the canopy being openable for crew exit from the craft whilst submerged at a destination.

Abstract: The present disclosure relates to the field of underwater robots, and in particular to a controllable sinking and floating swimming pool robot and a sinking and floating control method for a swimming pool robot. The controllable sinking and floating swimming pool robot of the present disclosure includes a sinking and floating control unit configured to control a swimming pool robot to float and sink; a waterline detection unit configured to detect a positional relationship between the swimming pool robot and a waterline of a liquid surface of a swimming pool where the swimming pool robot is located; and a main control unit configured to control a working state of the sinking and floating control unit to enter a floating working state based on detection results to realize a floating of the swimming pool robot.

Abstract: A retractable boat awning or “bimini cover” is provided. The present retractable boat awning may replace existing awnings on a boat or may be added to a boat which lacks an awning. The present retractable boat awning has a first folding locking bar and a second folding locking bar which are concealed within a slim securing container when the device is not in use. To use the awning, the first and the second locking bar are rotated outward from the interior of the securing container and secure a protective awning fabric cover. The awning may be fully assembled into the usable form or may be collapsed into the stored securing container in around a minute.

Abstract: Disclosed herein are several examples of a bilge pump support comprising: a mounting plate configured to be attached to a vessel; the mounting plate having a first pivot on a first longitudinal end thereof, an extension plate having a first end connected to the first pivot and extending longitudinally therefrom in a first longitudinal direction; a second pivot on a second longitudinal end of the extension plate; a pump plate connected to the second pivot and extending longitudinally therefrom and extending longitudinally therefrom in the first longitudinal direction; the pump plate configured to have a bilge pump attached thereto within a bilge of a vessel; and wherein the pump plate is longitudinally and vertically offset from the mounting plate.

Abstract: A gyroscopic roll stabilizer for a boat includes an enclosure mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure, and a flywheel assembly including a flywheel and flywheel shaft, with the flywheel assembly rotatably mounted inside the enclosure for rotation about a flywheel axis. The gyroscopic roll stabilizer also includes a motor operative to rotate the flywheel assembly and disposed inside the enclosure. A motor cooling circuit is configured to transfer heat away from the motor. The motor cooling circuit has a closed fluid pathway for recirculating cooling fluid therein. The fluid pathway includes a fluid channel jointly defined by the motor and the enclosure and having the cooling fluid therein. The gyroscopic roll stabilizer is configured to transfer heat away from the motor to the cooling fluid. Related methods are also disclosed.

Abstract: A method for providing a swim fin includes providing a foot attachment member and a blade member having a predetermined blade length. The blade member has a soft portion made with a relatively soft thermoplastic material. The method includes providing a relatively harder portion and the relatively soft thermoplastic portion that is molded to the relatively harder thermoplastic portion. The method includes providing an orthogonally spaced portion of the relatively harder portion that is arranged a predetermined orthogonal direction while said swim fin is in state of rest. The method includes providing the blade member with a predetermined biasing force portion that is arranged to urge the orthogonally spaced portion while the swim fin is in a state of rest. The method includes arranging a significant portion of the blade length to experience pivotal motion a lengthwise angle of attack during use.

Abstract: An ocean wave and tidal current energy conversion system includes a first vessel and a second vessel, the first vessel being parallel and spaced apart from the second vessel. The first and second vessels include supports that receive cylinders that rotate from ocean waves and currents to create hydraulic oil pressure via hydraulic cylinders. The hydraulic oil in the energy conversion system is pumped into a pressure accumulator that removes hydraulic surges and operates an electric generator. The electric generator may power an electrolysis batch system for the production of hydrogen that fills each vessel with hydrogen gas.

Abstract: An outboard motor includes a swivel bracket supporting a drive shaft housing such that the drive shaft housing is pivotable about an axis thereof and is movable in an axial direction thereof, a steering adjuster attached to the swivel bracket and configured to increase or reduce a rotational resistance force of the drive shaft housing against the swivel bracket, and at least one spacer mounted to the drive shaft housing at a position adjacent to at least one of both ends of the swivel bracket in the axial direction. In a state in which the spacer is mounted to the drive shaft housing, the drive shaft housing is restricted from moving in the axial direction with respect to the swivel bracket. A dimension from the swivel bracket to a rotation shaft of the propeller is changed by changing a mounting position of the spacer.

Abstract: The Boating Accessory is a multi-use fastener designed to attach to various surfaces or objects on a boat. The Boating Accessory may include a body hingedly connected to an arm with a suction mechanism that can be used to secure a corner onto either fiberglass or window glass. The Boating Accessory may include a clip with a rounded portion that can be used to attach to most stainless handles or deck railing with a strong spring for clamping. The clip is useful in attaching to fabrics or hard roofs with a friction member at the contact point. The multi-use fastener may be used to secure a shade anywhere on a boat to immediately and effectively block the sun's rays. When the sun moves lower to the horizon, the multi-use fasteners can be quickly repositioned.

Abstract: A convertible bimini top for a marine vessel has a cover frame, a support arm for supporting the cover frame above the marine vessel, the support arm having a lower end configured to be pivotably coupled to the marine vessel and an upper end pivotably coupled to the cover frame, a lower actuator coupled to the lower end of the support arm, the lower actuator being configured to pivot the support arm relative to the marine vessel to move the cover frame up and down relative to the marine vessel, and an upper actuator coupled to the upper end of the support arm and to the cover frame, the upper actuator being configured to pivot the cover frame relative to the support arm.

Abstract: A small planing watercraft includes: a body; a seat located above the body; a steering handle located above the body and forward of the seat; and an additional part holding mount secured to the handle and disposed forward of a rear surface of the handle.

Abstract: A floating foundation for an offshore wind turbine has a center pipe, a buoyancy section, a weight section, and a plurality of wire ropes, The buoyancy section is connected to the center pipe to keep the foundation floating. The weight section is connected to the center pipe to provide stability to the foundation. The wire ropes are connected to the buoyancy section and the weight section and are arranged for being tensioned so as to add bending strength to the foundation The floating foundation has hoisting means for lowering or raising the center pipe. The hoisting means includes winches for increasing or decreasing a length of each of wire ropes connecting the buoyancy section and the weight section, for lowering or raising the center pipe of the floating foundation. A system is disclosed for extracting energy from wind. A method is disclosed for installing a wind turbine.

Abstract: A watercraft pump assembly for pumping fluid, the pump assembly including a pump intake adapter that creates a conduit through which fluid may flow; a pump coupled to the pump intake adapter to convey the fluid through the conduit; processing circuitry configured to control the pump, the processing circuitry comprising at least one computer interface; and a tablet computer coupled to the computer interface, the tablet computer comprising a user interface. Other systems and methods are provided.