Abstract: A kayak having a hull shape in which the wetted area is situated over the forward two-thirds section of the hull with the rear hull section having minimal wetted area to provide a kayak of increased steering leverage, and of exceptional maneuverability and speed. The hull has asymmetry that is defined by length-to-girth ratio.

Abstract: Disclosed are apparatuses and methods for the adaptation of a subsea vehicle, such as an ROV, and in particular a hydraulically powered construction or maintenance work ROV. In one embodiment the vehicle is provided with a module or modules which provide further propulsion means that have reduced noise at high speed in comparison to the vehicle's main propulsion means. The module or modules also optionally provide greater performance and decreased drag. An ROV adapted in such a way is therefore suitable for high speed survey work. In another embodiment a hydraulic ROV is adapted to enable it to be able to directly drive electrically powered tools.

Abstract: A surfboard has a surfboard body, an electric motor, and a propeller. An electric power circuit provides power to the electric motor from a source of electro-motive force within the interior of the surfboard body. Additional electrical components, which may be capacitor banks, limit the rate of acceleration of the surfboard body. Several different capacitor banks may be included to provide selectable rates of acceleration.

Abstract: An assembly (10) is provided for mounting a hydrofoil, trolling plate or trolling motor (or other accessory) on the anti-ventilation plate (14) of a sterndrive or outboard motor (16) without the need to modify the plate or motor. The assembly (10) has lower and upper elements (20, 22) which are secured about the plate (14) by bolts (34). The upper element (22) has a bolt pattern (40) to mount the hydrofoil or other device. A catch (60, 88, 88a, 88b, 88c, 88d) mounted on the lower element (20) can be engaged in the trim tab or anode recess. Grip devices (50) can be mounted on the lower element (20) that are adjusted to grip the edges of the plate (14).

Abstract: A water survival system and a method are disclosed for detecting the danger of a person drowning in a body of water. The water survival system includes a breast belt and a life jacket. The breast belt has at least one physiological condition sensor affixed thereto while the life jacket has an expandable chamber connected to a compressed gas supply via an activating mechanism. As the compressed gas enters the expandable chamber, the life jacket increases in buoyancy. The life jacket also has a water contact sensor, a global positioning system device, first and second body orientation sensors, a transmitter which is capable of sending a signal to a remote receiver, and a control unit capable of receiving real time signals from each of the sensors and evaluating and comparing the real time signals against corresponding ranges of preset acceptable values to determine if the person wearing the life jacket is in danger of drowning.

Abstract: Provided is a water shoe facilitating walking on a water surface. The water shoe of the present invention includes: a foot fixing portion to fix a foot; a supporting bar coupled with the foot fixing portion; a floating membrane foldable toward and unfoldable from the supporting bar with the supporting bar functioning as a pivot shaft to provide buoyancy to the water shoe when the floating membrane comes into contact with a water surface; and a folding hinge portion coupled with the floating membrane to fold and unfold the floating membrane. The water shoe of the present invention has a simple structure, and may be put to use in water leisure sports at an inexpensive cost. Further, the water shoe may be used even in a narrow area, without a motor boat, and almost unencumbered by weather conditions.

Abstract: A jet propulsion unit has a water inlet, a pump body, an impeller, and a valve assembly fluidly. The valve assembly has a valve housing having an inlet fluidly connected to the pump body, a first outlet and a second outlet. A valve body is disposed in the valve housing and is movable between first and second positions. In the first position, water from a body of water flows consecutively through the water inlet, the pump body, the inlet of the valve housing, the valve housing and the first outlet of the valve housing. In the second position, water from the body of water flows consecutively through the water inlet, the pump body, the inlet of the valve housing, the valve housing, and the second outlet of the valve housing. A watercraft having the jet propulsion unit is also disclosed.

Abstract: Provided is a protective cover kit for a marine propeller having a protective cover and a shift control warning attachment. The protective cover components have a slit and a central opening with a plurality of reliefs radiating from its circumference capable of accommodating various sized propeller hubs or shafts. Attaching elements are coupled to a slit and the first layer and second layer of the protective cover. The first and second layers are of a shape capable of substantially encasing a marine propeller. Once a force is applied by a user to the release apparatus, the attaching element is released and the protective cover is removed remotely from a distance above the surrounding water of the marine propeller. A shift control warning attachment is installed by a user onto a shift control lever to prevent inadvertent shifting prior to the removal of the propeller cover.

Abstract: A water flow limiting system for a boat including a water flow limiting plate, a coupling mechanism and a controllable bite ram. The water flow limiting plate is positioned below the propeller shaft and forward of the propeller for limiting water flow to the propeller. The coupling mechanism is provided for steering the water flow limiting plate relative to the boat. The coupling mechanism may be a mounting mechanism which maintains the flow limiting plate generally aligned with the propeller shaft, or it may be a steering mechanism which steers the flow limiting plate relative to the propeller shaft. The controllable bite ram controls vertical displacement of the flow limiting plate relative to the propeller shaft. A propeller guard system positioned above the water flow limiting plate may be included. A cooling coil may be affixed to the water flow limiting plate.

Abstract: A spring-loaded flap rudder adapted to be mounted to the hull structure of a ship. In a geared version of the invention, the rudder includes a rudder member and a rudder gear including rudder teeth. The rudder also includes a flap member pivotally connected to the rudder member with a spring and a movable flap gear. The flap gear includes a rod movably engaged in a socket of the flap member and gear teeth for engagement with the rudder teeth of the rudder gear.

Abstract: An adjustable surf wake system enhances a wake formed by a watercraft travelling through water. The system may include a flap for deflecting water traveling past the stern of the watercraft, and/or a positioner operably connected to the flap for positioning the flap relative to a longitudinal axis of the watercraft between a neutral position and an outward position. Positioning a port flap in its extended position enhances a starboard surf wake, and positioning the starboard flap in its extended position enhances a port surf wake.

Abstract: A gear housing for an aquatic vessel is adapted to be attached at an attachment site to an underside of a hull of the aquatic vessel. The gear housing includes at least one weakened region adapted to yield when the gear housing is rotated at the attachment site following an impact. A breakaway safety system includes such a gear housing, and a fracturable member for attaching the gear housing to the hull at the attachment site, wherein the weakened region is adapted to yield such that the fracturable member fractures. An aquatic vessel includes such a gear housing or such a breakaway safety system.

Abstract: Various embodiments are disclosed herein that relate to recreational self-propelled watercraft. For example, one disclosed embodiment provides a self-propelled watercraft including a hull, a deck comprising a first seat receiver configured to support a seat at a higher position and a second seat receiver configured to support the seat at a lower position, and a seat securing mechanism configured to be operable by a user to selectively secure the seat to the deck.

Abstract: A ship s fender system and method of deployment and retrieval comprising a group of fenders (12) linked together to lie on the surface of the water adjacent a ship s hull (11) with hauling lines (14) connected by davits (15) to winches to lower and raise the fenders. Each hauling line (14) is connected to its respective fender by a two-part ball and tape connector so that connection and release of the hauling lines (14) is carried out automatically and remotely thus avoiding the need for the conventional hazardous procedure whereby the lines are connected and disconnected manually by a crew in a boat. The system may be used to deploy and retrieve other floatable objects such as working platforms or submersible vehicles.

Abstract: An advanced bilge keel design for improved ship roll damping performance. The advanced bilge keel design includes curved upper and bottom surfaces and improved free end edge design for providing passive roll stabilization and improved energy dissipation.

Abstract: A system and method of starting a water jet propulsion system for a ship in which the propulsion system includes a stator shell adapted to be mounted to the hull and having a nozzle ending in an outlet with a cross-sectional outlet area, an impeller housing attached to the stator shell and having an upstream inlet, and an impeller rotatably mounted in the impeller housing for receiving water from the inlet and discharging it through the nozzle of the stator shell so as to create a water jet upon rotation of the impeller. The method includes reducing the outlet area by partly closing the nozzle during a start up phase of the water jet propulsion system, wherein there is provided a back flow hindering arrangement arranged to hinder air to enter into the impeller housing via the nozzle.

Abstract: A watercraft has a hull and a deck disposed above the hull. A helm assembly disposed above the deck has a steering column and a handlebar. A pedestal is disposed on the deck at least in part rearwardly of the handlebar. A support structure bears the helm assembly. The support structure surrounds at least in part the steering column. The support structure has at least one rear connection portion connected to the pedestal. The support structure has at least one front connection arm connected to at least one of the deck and the hull forwardly from the at least one rear connection portion. A watercraft with a deck having at least two portions is also presented.

Abstract: A method for operation of a hybrid propulsion system for a marine vessel, including at least one electric motor and at least one internal combustion engine as drive units, is disclosed. Depending on the requirement, for example the vessel speed, the drive units individually or jointly drive at least one propulsion unit, for example a propeller, the power outputs of the drive units to the at least one propulsion unit controlled by a control device as a function of a set value, for example a set value for the propeller rotation speed or the vessel speed, and an operating mode such that the sum of these power outputs results in a total power being output to the at least one propulsion unit, with this total power output being split between the power outputs of the individual drive units as a function of the set value and the operating mode.

Abstract: This invention relates to a platform of the FPSO type in the form of a mono-column, of circular or polygonal horizontal section or of a combination of circular and polygonal sections, comprising one or more central load tanks (12), which can be single or compartmented, surrounded, in an alternately and uniformly distributed manner, by permanent-ballast tanks (13) and by ballast tanks open to the sea (“moonpools”) (14).

Abstract: This embodiment relates generally to the Rowing Rig (30) for a suspended device (314), that may lead to the stabilization of a watercraft (32), such as kayaks and canoes, which allows an operator (316) to move and steer the watercraft (32) in a safe, ergonomic, and convenient manner. The rowing rig (30), with the example oarlock (40) adjustably connected to an outrigger (38), enables the support of and the counteraction of oaring forces imparted on oarlock (40), while allowing oarlock (40) to meaningfully adjustable in 3 independent axis relative to operator (316) location in watercraft (32). An inner guide system (52) can trap outrigger (38) in a secured position, or allow it to slidably travel within watercraft (32). The rowing rig (30) also allows the mounting of other systems, such as an anchor winch system, mounted to the base foundation (36) to counteract forces in deploying anchor.