Abstract: A trim tab for a ship comprises a first portion and a second portion. The first portion is swingably mounted to a rear portion of a ship body. The second portion extends from the first portion and curves in a swing direction away from the ship body.

Abstract: A watercraft, associated motor pod, and associated methods are provided. The motor pod is operable to maintain an orientation of the watercraft relative to a reference datum while the watercraft is moving or stationary.

Abstract: A wing, buoyant in water has an upper wing surface comprising a deck upon which a rider stands, and, the wing is in water. A foot constraint proximate the wing leading edge and fixedly attaching the wing projects outwardly from the deck to release-ably receive the rider's forward foot. With the rider standing with both feet upon the deck, and the rider's forward foot ensconced within the foot constraint, and with the rider's aft foot proximate a trailing edge of the wing, the rider bodily heaves and pitches the wing to obtain a chordwise forward velocity thru the water. The forward foot constraint enables the rider to upheave the wing. A second foot constraint may attach the deck proximate the wing trailing edge. Another foot constraining system is comprised as a frictional device broadly applying the deck, and, may be used in addition to or in lieu of other constraints.

Abstract: Ultra-large marine submersible transport boats and arrangements for aqueous bulk liquids transportation, including fresh water and irrigation drainage, from specifically configured supply stations to specifically configured delivery stations. Boats present rigid hydrodynamic shaped double-walled submersible hulls incorporating a plurality of inside-reinforced impervious ballast chambers and also present radial reinforcing elements and hollow interior cavities that enclose collapsible bulk liquid bladders for transporting bulk liquids. Hulls can be made of reinforced concrete. Hull openings permit seawater circulation, avoiding transportation of bulk ballast seawater. Submersible cruising reduces structural loads and drag. An on-board hydro-pneumatic ballasting system adds to and removes reusable hull ballast water from, the ballast chambers controlling the hull's depth, pitch, and roll.

Abstract: A watercraft and a marine engine assembly for pivotably mounting to a watercraft about a tilt-trim axis are disclosed. The marine engine assembly includes an engine unit including: an engine unit housing; an engine disposed in the housing; and an exhaust conduit disposed in the housing, an exhaust inlet defined by the exhaust conduit being fluidly connected to the engine, the exhaust conduit extending forward and upward from the exhaust inlet and then subsequently extending downward and rearward to an exhaust outlet. The marine engine assembly also has a driveshaft operatively connected to the engine and a propulsion device operatively connected to the driveshaft. A center of mass of the engine is disposed below the tilt-trim axis at least when the driveshaft is vertically oriented.

Abstract: The invention relates to a bimini-style boat cover frame having electronically actuated worm gear drive units, the worm gear drive unit mounted on a boat and connected to a front frame assembly and a back frame assembly that supports a canopy covering.

Abstract: The present disclosure provides a small, inexpensive, long-lived underwater beacon locator. The beacon locator can illustratively include a housing, a communications link, a processor, a plurality of hydrophones and a motion generator.

Abstract: An inflation-based antifouling system and method that include an inflatable film configured to be disposed on a target clean surface; and an inflation device that inflates the inflatable film such that bio-fouling is removed from the target clean surface.

Abstract: A watercraft includes a plurality of separable body sections (2101, 2102, 2103, 2104, 2105, 2106) configured for assembly into a single assembled structure (2100) having a first length, and for packing into a packed structure (3000) having a second length smaller than the first length. The single assembled structure may be held together using latching devices, one or more of the latching devices including a latch unit comprising a latch support, a spring mount and a band spring, the band spring having a first spring end and a second spring end, wherein the latch support includes a latch and a first shaft positioned in relationship to the latch, the first shaft configured for rotatably mounting the first spring end of the band spring, and the spring mount includes a second shaft configured for rotatably mounting the second spring end of the band spring.

Abstract: A modular, weight-shift controlled watercraft device is disclosed which includes: a modular board removably attachable to a power system. The power system includes a modular power supply system, and a modular propulsion system. The power supply system includes a housing including a battery. The propulsion system includes a modular strut, a modular propulsion pod, and a modular hydrofoil. In one embodiment, the power supply system is removably and mechanically attachable directly to the propulsion system.

Abstract: A boat hull includes a serrated keel which is utilized to dissipate local energy and increase efficiency by reducing drag. In one embodiment, the boat hull preferably includes serrations which are teardrop shaped with a ratio of 3 to 1 in that the length of the teardrop cutout is 3 times the depth.

Abstract: A catamaran lifting apparatus is disclosed for lifting objects in a marine environment. The apparatus includes first and second vessels that are spaced apart during use. A first frame spans between the vessels. A second frame spans between the vessels. The frames are spaced apart and connected to the vessels in a configuration that spaces the vessels apart. The first frame connects to the first vessel with a universal joint and to the second vessel with a hinged connection. The second frame connects to the second vessel with a universal joint and to the first vessel with a hinged or pinned connection. Each of the frames provides a space under the frame and in between the barges that enables a package to be lifted and/or a marine vessel to be positioned in between the barges and under the frames. In this fashion, an object that has been salvaged from the seabed can be placed upon the marine vessel that is positioned in between the barges and under the frames.

Abstract: Provided herein is a pet carrier system for providing a defined area on a kayak for safe travel of a pet. In some embodiments, the pet carrier system includes a corral made of at least three vertical posts securable to the kayak, at least two railing bars connecting the three vertical posts, and at least three connectors for securing the vertical posts to the kayak. The corral provides a fenced structure from the front end of the kayak up to the area in front of the cockpit of the kayak. The system would dissuade a pet from moving transversely relative to the longitudinal axis of the kayak and would persuade the pet to either remain in the defined space or to move relatively aligned with the longitudinal axis of the kayak. This way, the pet is less likely to overstep onto either side of the kayak and cause the kayak to capsize.

Abstract: A mooring system comprising: a ballast platform; and a chain comprising a plurality of links that are pivotally connected to each other via parallel pivot pins such that the chain is configured to not rotate about a vertical axis that is orthogonal to axes of rotation of the pivot pins, wherein the chain has proximal and distal ends, and wherein the proximal end is attached to a top of the ballast platform and the distal end is configured to be attached to a buoyant object.

Abstract: An AUV support system includes: a surface ship; an underwater station configured to support an AUV which autonomously sails in water; and a cable connecting the surface ship and the underwater station. The cable includes: a first cable portion extending downward from the surface ship through a water surface when the underwater station is suspended in the water by the cable from the surface ship that is in a stop state on the water; a second cable portion extending upward from a lower end portion of the first cable portion when the underwater station is suspended as above; and a third cable portion extending downward from an upper end portion of the second cable portion and connected to the underwater station when the underwater station is suspended as above.

Abstract: A control system for posture control tabs of a marine vessel assists operations of a steering control. The posture control tabs are mounted on a stern of a hull to move up or down to control a posture of the hull. Actuators actuate the respective posture control tabs. When a steering instruction is provided through the steering control, a processor determines the posture control tab to be actuated and controls the actuator corresponding to the posture control tab determined to be actuated so as to change the position of the determined posture control tab.

Abstract: A house is provided. The house includes a base and a roof. The roof is attached to the base. The base has sufficient buoyancy to enable the house to float on water.

Abstract: One or more propulsion arrangements for water vessels, and in particular propulsion arrangements that include flanking rudders with bidirectional high-lift sections to improve performance, particularly in the reverse direction. The flanking rudders are positioned adjacent a propulsor for directing a slipstream flow when the vessel is travelling in the reverse direction. Each flanking rudder has an elongated profile extending from a first edge to a second edge, and in which each elongated profile has a first bulb portion, a convex middle portion, and a second bulb portion.

Abstract: A posture control system for a hull offers a more comfortable ride to crew on a marine vessel. A posture control tab is mounted on a stern of the hull and controls the posture of the hull. An actuator actuates the posture control tab. At least one propeller generates a propulsive force for the hull. An engine turns the propeller. A controller controls the actuator according to at least one of engine torque generated by the engine and propeller torque generated by the propeller.

Abstract: A control system for posture control tabs of a marine vessel prevents posture control tabs from coming into contact with a foreign object. The posture control tabs are mounted on a stern to control a posture of a hull. Actuators actuate the respective posture control tabs. When it is judged that that the hull is being loaded onto a trailer or it is detected that the hull has entered a speed restriction zone, a controller controls the actuators to position the posture control tabs at retracted positions.