Abstract: The invention comprises a paddle board apparatus and method of use thereof, comprising: a manual crank connected to a drive shaft, a rotatable housing, and a set of paddle wheels connected to an outer surface of the rotatable housing, where a child manually turning the crank simultaneously propels the paddle board forward in water through use of the paddle wheels and drives an air pump in the rotatable housing to blow bubbles about the paddle board for enjoyment of the child riding the paddle board.

Abstract: A modular boat that includes a main body that is hollow and has suitcase like dimensions; inflatable floating elements that are detachable coupled to the main body via first mechanical interfaces; a boat control unit that is movably coupled to the main body and is configured to move between a first position to a second position, the first and second positions differ from each other by at least a distance of a distal part of the boat control unit from the main body; a propulsion unit; wherein a when the modular boat is at a disassembled state, the one or more inflatable floating elements are not detachably coupled to the main body.

Abstract: 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.

Abstract: An adjustable support connected to a deck of an aquatic vessel for supporting a deck seat.

Abstract: A docking/charging module for an undersea autonomous vehicle comprises a housing allowing the undersea autonomous vehicle to dock, thereby establishing both a data connection and a power connection between the module and the vehicle, the module being equipped with the battery which is charged from an undersea cable having a power conductor which may charge the undersea autonomous vehicle via the power connection when the undersea autonomous vehicle is docked with or in proximity to the docking/charging module.

Abstract: The present invention relates to an exhaust system for a combustion engine of a marine vessel. The exhaust system includes an exhaust system inlet configured to be coupled to an exhaust gas outlet of the marine engine, one or more exhaust system outlets, and an exhaust gas flow path extending from the inlet to the one or more exhaust system outlets and having a forward flow direction from the exhaust system inlet and a reverse flow direction extending from at least one of the one or more exhaust system outlets. The exhaust system further includes a flow redirection arrangement in the exhaust gas flow path for restricting a flow of liquid flowing in the reverse flow direction, the flow redirection arrangement comprising at least one flow redirection feature configured to redirect a first stream of the liquid toward the forward flow direction to collide with a second stream of the flow of liquid. The invention also relates to motor assemblies and marine vessels having such exhaust systems.

Abstract: A system for steering marine propulsion devices. Steering actuators are configured to change steering angles of the marine propulsion devices. A control system is operatively connected to the steering actuators. The control system is configured to receive a steering request for steering a first device among the marine propulsion devices, compare a steering angle of the first device to a steering angle of a second device among the marine propulsion devices, and control the steering actuators to steer the first device only when the steering angle of the first device is within a threshold range of the steering angle of the second device.

Abstract: A bottom touching assisting device suitable for deep-sea submersibles and an implementation method thereof are provided. Four support columns are arranged within a mounting box body at a bottom of a deep-sea submersible, the support columns and the mounting box body are connected in a sliding manner through sliders, and the support column is sleeved with a threaded sleeve in a threaded connection manner. In conjunction with a drive component and a pressing mechanism, smooth vertical movement of the support column is achieved when the threaded sleeve rotates. This allows a bottom end of the support column to extend from the mounting box body.

Abstract: An apparatus that facilitates search and rescue, for example, in open water. The apparatus comprises a substrate with a particular geometry and a perimeter. The apparatus further comprises a cover positioned atop the substrate with the cover also having a particular geometry and perimeter, which correspond to the geometry and perimeter of the substrate. An air-tight seal seals the substrate perimeter to the cover perimeter and creates a sealed internal region. A breakable vessel holding an activator is located in the sealed internal region, along with illuminable dyes that are also located in the sealed internal region. When the breakable vessel is broken, the activator reacts with the illuminable dyes and illuminates the illuminable dyes.

Abstract: An agricultural amphibious bait feeding boat includes a boat body. A bait feeding device is fixed to one end of the boat body, and a propulsion device is fixed to the other end of the boat body. The boat body includes two foam floating bodies, foam fixing carbon rods, a transverse carbon rod, tube ferrule fixing assemblies, and tee joints. The two foam floating bodies include a left foam floating body and a right foam floating body, the foam fixing carbon rods parallel to each other are respectively arranged above the two foam floating bodies, and the foam floating bodies and the foam fixing carbon rods are fixed through the tube ferrule fixing assemblies. The transverse carbon rod is connected to the foam fixing carbon rods through the tee joints, and the left foam floating body and the right foam floating body are fixedly connected to each other.

Abstract: A floatation device is provided. In some embodiments, a floatation device is provided, comprising an inflatable ring composed of a transparent material, wherein the inflatable ring includes: an outer air chamber having a first valve for inflating the outer air chamber; an inner air chamber having a second valve for inflating the inner air chamber, wherein the outer air chamber and the inner air chamber are not in communication; a cut through the outer air chamber and the inner air chamber of the inflatable ring that forms opposing ends of the inflatable ring; and a plurality of fasteners placed on a top surface and a bottom surface of the outer or inner air chamber for detachably connecting the opposing ends of the inflatable ring.

Abstract: A system for a transom-mount trim tab with a fluid hinge, including a trim tab having a planar surface, a forward section located under a hull of a watercraft, a rear portion extending aft of a transom, a pair of guiding tabs coupled to the trim tab, and a forward mounting means including fluid hinge brackets, each with a mounting plate, and a containment protrusion. The system further includes a pair of aft mounting brackets configurable for variable mounting, wherein each mounting bracket includes a vertical leg having an upper portion configurable to be angulated relative to a transom of a watercraft and a bottom portion configured in a vertical orientation. The upper portion of the vertical leg and the mounting bracket have a configurable angle there-between.

Abstract: A system is demonstrated for heave neutralisation of semisubmersible platforms that can be built into any conceivable configuration of such platforms. That the system is also conceivably active and predicatively can be controlled can be concluded by analysing the appended calculation models. As an example FIG. 18, column E, is mentioned, wherein the water volume increments in the rise canister are 37 cubic metres for each half metre of wave height, so that, with reference to column A, from H=10.5 m to H=12 m is 4×37 148 cubic metres more than 150 tonnes—simultaneously with the air pressure, shown in column K, increasing from 123.86 to 131.05 kPa, a difference of just 6.19 kPa (0.0619 bar or 61.9 millibars). Large ballast volumes can be moved out and in of the system at small pressure changes and short response time.

Abstract: The structure comprises a hull extending longitudinally along a longitudinal hull axis, a mooring equipment, comprising a first group of mooring lines connected to an anchor on the bottom of the body of water, the mooring lines of the first group protruding laterally beyond a first side of the hull, opposite the second side of the hull. The mooring equipment comprises a second group of mooring lines protruding laterally beyond the second side, and connected to an anchor located away from the second side on the bottom of the body of water. The mooring lines of the first group are connected on the first side of the hull, the space facing a second lateral wall of the hull being free of mooring lines.

Abstract: The present application relates to power transmission system used in marine engines and in particular to a divided gear wheel (11, 12), for a power transmission system 1,2, used in marine engines, to a power transmission system used in marine engines to a method to operate said power transmission system and to a marine engine comprising a power transmission system.

Abstract: A small watercraft system includes: a watercraft body; a watercraft body manipulation member through which a watercraft body manipulation command is input by an operator; a drive source that allows the watercraft body to plane; a steering device that allows the watercraft body to be steered; and a control device that controls the drive source and the steering device to operate the watercraft body. The control device determines whether a mode switching condition is satisfied, the mode switching condition including an operator's absence condition that the operator is absent from the watercraft body. Upon determining that the mode switching condition is satisfied, the control device executes an operator-absent manipulation mode in which the control device moves the watercraft body by controlling the drive source and the steering device based on an operator-absent manipulation command independent of the watercraft body manipulation command.

Abstract: Cuff assemblies for sports board leashes, where the cuff assembly includes a central section that having a precurved molded insert that is configured to connect to a cord of the sports board leash, a first wing attached to a first side of the central section, and a second wing attached to a second side of the central section. The maximum width of the central section of the cuff assembly is greater than the maximum width of either of the first wing or second wing, and the first wing and second wing are configured to overlap and fasten to each other in order to secure the cuff assembly around a person's limb portion.

Abstract: The present invention provides an angle changeable apparatus and an oar such that the shaft angle is easily adjustable. Disclosed is an angle changeable apparatus 1 for variably changing an angle of a shaft 110 inserted in a sleeve 10, including: a shaft-side member 20 fixed to the shaft 110; a sleeve-side member 30 fixed to the sleeve 10; and a slider 40 configured to slide between the shaft-side member 20 and the sleeve-side member 30, wherein the shaft-side member 20 has a first guiding part extending in a shaft direction, the sleeve-side member 30 has an elongated hole 31 extending in an oblique direction relative to the shaft direction, the slider 40 has a groove 41c guided by the first guiding part and a slider main body 41 guided by the elongated hole 31.

Abstract: A thruster power control box assembly includes a housing having a cover. Inside the housing is a switch circuit and a switch control circuit. The switch circuit directs current from an external battery to a pair of thruster cables that are connected to a thruster. The switch control circuit controls the switch circuit by configuring the direction in which current from the battery flows to the thruster cables so that the thruster can operate in both directions. The housing incudes bushings through which the various cables and conductors pass, and are sealed by a compliant plug and a compression nut on each bushing. A terminal box can be used to connect the various cables of the thruster to their corresponding cables of the thruster power control box.

Abstract: Water walking skis and a method for boarding them, in which each ski has an elongated body with a bow end in the form of a monohull and a stern end in the form of a twin hull. The skis can be combined with a pair of poles for balance, and binding straps for binding the skis and poles together while boarding/reboarding. The deck of each ski typically has a recessed area for foot placement, and two parallel side extensions protrude downward from the deck. The side extensions, the deck, and an underside or bottom cover together form a tunnel within the ski, the tunnel having a screen-covered first opening for admitting water and a rear opening for expelling water. Traction gates are mounted within the tunnel and spaced apart therein for permitting water flow therethrough when the ski moves forward, while preventing water flow when moving in the reverse direction.