Abstract: Disclosed is a bionic fish single-degree-of-freedom modular structure based on a cam mechanism. The bionic fish single-degree-of-freedom modular structure comprises a plurality of modules which are sequentially connected, wherein the foremost one of the modules is a fish head module, and the last one of the modules is a fish tail module; each module in the modules comprises a rack, a rotating shaft is arranged in the center of the rack in a penetrating mode, the second end of the rotating shaft of the previous module is connected to the first end of the rotating shaft of the next module through a universal coupling, the next module is connected with the previous module through a swing connecting piece, and the effect that the modules swing in a plane is achieved.

Abstract: A method and system for controlling a marine vessel is configured to operate a lanyard system to detect at least one fob worn by an individual present on the marine vessel and determine that a missing fob of the at least one fob is no longer detected, wherein the missing fob is either an operator fob or a passenger fob. A man overboard event is generated based on the missing fob, wherein the man overboard event is an operator overboard event if the missing fob includes the operator fob or a passenger overboard event if the missing fob is the passenger fob. One or more search assistance functions are automatically activated based on the man overboard event, wherein the search assistance functions activated depend on whether the man overboard event is the operator overboard event or the passenger overboard event.

Abstract: An outboard motor includes a bracket, an outboard motor body, a harness, and a seal. The bracket is attached to a transom of a boat. The outboard motor body is supported by the bracket. The harness extends from the outboard motor body through an opening of the transom into the boat. The seal is detachably attached to the opening to hold the harness.

Abstract: A hydraulic power trim lift device for a marine propulsion system has at least one lift cylinder, at least one pump and a tank. The lift cylinder has a lift piston chamber and a lift rod chamber separated from the lift piston chamber by a lift cylinder piston. The pump is connected to the lift rod chamber via a first line arrangement and to the lift piston chamber via a second line arrangement. The lift piston chamber is connected to the tank via the second line arrangement when the first line arrangement is pressurized. The second line arrangement has a flow control device acting in the direction of flow to the tank. Furthermore, a marine propulsion system with such a power trim lift device is provided.

Abstract: As a conventional antifouling measure to prevent adherence of aquatic organisms to a submersible sensor unit, a grease containing a stimulant, such as mustard, capable of repelling aquatic organisms is applied onto a sensing part thereof, thereby preventing adherence of the aquatic organisms. However, the irritant-containing grease applied onto the sensing part will come off within one to two months, resulting in disappearance of its effect. Thus, it is necessary to perform work of pulling up the submersible sensor unit and re-applying the grease, in each case. The present invention provides a water flow resistant submersible sensor unit which comprises an aquatic organism adherence preventive film capable of preventing adherence of aquatic organisms even when used in the submersible sensor unit for about half a year, almost without involving any underwater movement, and capable of, after use, being easily peeled off from the submersible sensor unit.

Abstract: A shape memory alloy composite fabric and a method of use is provided in underwater pressure vessels and as flexible joints in atmospheric diving suits. The atmospheric diving suit internal pressure is one atmosphere for underwater transit to and from an underwater work site. During operations at a work site, the shape memory alloy joints transform to a martensite phase and enable greater flexibility while the pressure in the atmospheric diving suit equalizes with ambient depth pressure.

Abstract: The present invention relates to a device (1) for setting the drive position of an electric drive of a boat, having a housing (14) with two receiving elements (15a, 15b) arranged on two opposing side walls (140) of the housing (14) for defining a pivot axis (17) and a drive lever (10) that can be pivoted around this pivot axis (17), wherein the drive lever (10) is received by two receiving elements (15a. 15b).

Abstract: A method and system for the offshore production of fuel includes an offshore marine platform on which is mounted a hydrogen production unit. The hydrogen production unit may produce hydrogen utilizing raw materials sourced adjacent the marine platform, including seawater and electricity from offshore wind turbines. The produced hydrogen may then be blended onboard the marine platform with liquefied natural gas delivered to the marine platform in order to produce a blended fuel comprised of the delivered natural gas and a portion of the produced hydrogen. The blended fuel may be subsequently liquified and transported away from the marine platform, or conveyed to a remote location via a seabed pipeline, or combusted by onboard combustion turbines that can in turn drive electric generators onboard the marine platform to produce electricity.

Abstract: Systems and methods are provided to detect and identify targeted objects buried in the seabed. A targeted area of the seabed may be scanned with a sub-bottom profiler based on predetermined parameters. A localization engine may model the sub-bottom profiler data using a Levenberg-Marquardt non-linear least squares determination. Distance measurements may be extracted based on the modeled data, including a vertical range based on a slant range measured from the sub-bottom profiler to the closest points on the exterior of the targeted objects. The location of the targeted objects may be based on the extracted measurements. In some embodiments, the sub-bottom profiler may be mounted on an unmanned underwater vehicle having thrusters to navigate the vehicle toward the targeted area to excavate and sidescan the targets object.

Abstract: A marine vessel including a hull extending horizontally from a bow to a stern with a midpoint therebetween. The hull has opposing walls that extend upwardly, where the opposing walls have inner sides that face inwardly toward each other and outer sides that face outwardly. A first of the outer sides defines a first opening therein that is horizontally closer to the midpoint than to the stern and horizontally closer to the midpoint than to the bow. An engine compartment is configured for positioning an engine therein. A first conduit fluidly couples the first opening and the engine compartment for at least one of ventilating and exhausting the engine compartment. The first opening is positioned to prevent water from entering the first conduit.

Abstract: A boat, having a transom, includes one or more aft-facing seats. Each aft-facing seat is positioned proximate to the transom and includes a seat bottom that is inclined at a downward angle in a direction extending from aft to fore, a seatback, a headrest, a seat support structure having at least one hidden compartment therein, and at least one pivot mechanism attached to the seatback and the headrest and configured to allow the seatback to move between a first position in which the seatback is capable of supporting the back of a person seated in the seat and a second position in which the seatback is pivoted upwardly to allow access to the compartment and the headrest to move between an upright position and a folded position. A plurality of handles may be provided for each aft-facing seat, with one at an outboard side and another at an inboard side.

Abstract: A hydraulic piston spud pole for anchoring a vessel may comprise an elongate sleeve having a top, a hydraulic inlet, and a bottom terminating in a bottom aperture, a portion of the elongate sleeve being formed to contain a hydraulic column; a spud pole having a piston vertically-movably seated within the elongate sleeve; and a pump assembly connected to the hydraulic inlet that is preferably activated by a controller to lift or drop the spud pole. The elongate sleeve may comprise a vertically-extending inner surface and a sleeve bearing, and the spud pole may comprise a vertically-extending outer surface configured to fit closely against the sleeve bearing while the piston fits closely against the elongate sleeve's vertically-extending inner surface. The hydraulic column may be defined between the vertically-extending outer surface of the spud pole, the vertically-extending inner surface of the elongate sleeve, the piston, and the sleeve bearing.

Abstract: In embodiments, the kicker mount system comprises a deck mount unit connected to a kicker motor receiving unit, both cantilevered off of the stern end of pontoon boat deck. The deck having a horizontal deck pad and trim rail about the deck pad. The kicker mount system attaches exclusively to the deck on the deck pad and on the trim rail without any additional support structure securing the kicker mount system to the pontoon boat. The kicker motor receiving unit is vertically adjustably attached to the deck mount unit. The deck mount unit having an L-shaped pontoon deck plate with a horizontal portion that attaches to the deck top surface, and a vertical portion that attaches with a toggle bolt into the trim rail. Upright cantilevered extension plates project rearward from the L-shaped deck plate, the extension plates having a hump portion projecting upwardly above the deck plate.

Abstract: The hydraulic system according to the invention is a hydraulic system for controlling a stabilizer drive, in particular for controlling an angle of attack and/or a pivoting out and in of a stabilizer wing, preferably for ships. The hydraulic system according to the invention has a rotary vane motor that changes the angle of attack of the stabilizer wing and/or a hydraulic cylinder for pivoting the stabilizer wing out and in, along with a first hydraulic circuit. The first hydraulic circuit furthermore comprises a low-pressure circuit and a high-pressure circuit, a device for providing an admission pressure of the low-pressure circuit, and two anti-cavitation valves which separate the first low-pressure circuit from the first high-pressure circuit. The hydraulic system according to the invention is furthermore characterized in that a first hydraulic pump driven by an electric motor and having two connections is integrated in the high-pressure circuit.

Abstract: Axial Flux Outboard Propulsion System for an Electric Boat having a first axial flux motor that is positioned adjacent to a second axial flux motor and the ability to selectively turn each motor on or off via the control system based on the request or need for torque.

Abstract: An underwater swimming aid includes a power device and a camera instrument fixing device, and the power device includes a propeller for providing power to drive the underwater swimming aid to advance and a connecting plate fixed to the propeller; and the camera instrument fixing device includes a mounting bracket and a fixing bracket, the mounting bracket is fixed to the connecting plate and is fixedly connected to the fixing bracket, and the fixing bracket is used for fixing a camera instrument. According to the underwater swimming aid, the camera instrument fixing device is fixed to an existing underwater swimming aid, and the camera instrument is mounted on the camera instrument fixing device, so that users can photograph underwater scenes while enjoying funs brought by the swimming aid.

Abstract: A personal watercraft includes a floatation member, a thrust assembly, a steering assembly, and a braking assembly. The assemblies may be actuated either mechanically or electrically. The thrust assembly is human powered, solar powered, or electric powered. The thrust, steering, and braking assemblies can be added after-market to an existing stand-up paddle board (SUP), or built into one or a plurality of SUPs during initial manufacturing. When the thrust assembly is human powered, it is leg or arm powered. When the thrust assembly is leg powered, the legs can move backward and forward in a sliding motion, up and down in a stomping fashion, or move in a loop trajectory. When the thrust assembly is arm powered, the arms can move forward/backward together or separately. The thrust assembly includes one or a plurality of paddles or flippers that are positioned to the side or under the SUP.

Abstract: An exhaust system for a combustion engine vehicle includes an exhaust pipe extending between an exhaust inlet disposed opposite an exhaust outlet. The exhaust inlet and exhaust outlet are in fluidic communication with one another. The exhaust inlet is configured to receive an exhaust gas produced by an internal combustion engine of the combustion engine vehicle. A second pipe has an air inlet extending from and connected to the exhaust pipe. The second pipe is configured to be in fluidic communication with the exhaust outlet. The air inlet is configured to receive an outside flow of air. The exhaust gas from the combustion engine vehicle and the outside flow of air captured by the air inlet when the combustion engine vehicle is moving forward are configured to be combined and to cooperatively exit out the exhaust outlet.

Abstract: The present invention provides a power train for an amphibian operable in land and marine modes. The power train including a prime mover, a first land propulsion device, a first marine propulsion device, and a speed change transmission, wherein the prime mover is arranged to drive the first land propulsion device via the speed change transmission in land mode, and at least a portion of the prime mover is located between the speed change transmission and a rearward most part of the amphibian, with the speed change transmission located spaced ahead of the prime mover by a selected distance using one or more drive shaft(s).

Abstract: An outboard motor is provided with: an encoder which detects the rotational speed of an engine; a position sensor which detects an operating position of a shift lever; and a state quantity detection unit which detects a state quantity of a shift actuator. A control device of the outboard motor determines whether the state quantity is more than or equal to a stop-initiating threshold value when the operating position has been switched. If the state quantity is more than or equal to the stop-initiating threshold value, the control device implements a stop control to stop ignition and/or fuel injection in the engine.