Abstract: A torpedo recovery system is provided with a hull and a float conformable on a host vehicle and lifting wire coiled on a spool attached by an extension spring as well as with an anchor to the float. An oval hole penetrates the recovery system hull at positions lined with a watertight sleeve. The spool can accommodate a locking pin. The extension spring allows compliance for take-up of the spool by having the locking pin mate with an aperture and adds a wire pre-tension. Upon vehicle shutdown; the locking pin is retracted to free the spool from a rotational constraint. The float buoyancy translates into pulling the wire from the spool with the float and extension spring continuing to the water surface. Once the float reaches the surface; the float provides a visual location for the host vehicle. The float is retrieved and a winch can recover the lightweight torpedo.

Abstract: A tool interchange for a submersible remote operated vehicle (ROV) arm includes a first interchange body that affixes to an ROV arm. A second interchange body is carried by the first interchange body to rotate on a rotation axis. The second interchange body includes a tool mount actuable between gripping an ROV tool to the second interchange body and releasing the ROV tool from the second interchange body. An inductive power coupling part is provided in the tool mount. The inductive power coupling part is presented outwardly in the tool mount opposite the first interchange body, resides on the rotation axis and is fixed with respect to the first interchange body while the second interchange body rotates. The inductive power coupling part is adapted to inductively communicate power with a corresponding inductor power coupling part of the ROV tool when the ROV tool is docked in the tool mount.

Abstract: A method comprising: providing an autonomous vehicle (AV) with a first estimated position of a target; directing the AV to travel toward the first estimated position at a constant velocity; receiving echo signals of transmitted sonar signals, the echo signals indicating a range and an azimuth of the target; determining a depth difference of the AV and the target based on the received echo signals, the depth difference being determined based on changes to the range and azimuth of the target over time; and in response to a depth difference existing, re-directing the AV toward a second estimated position of the target generated from the depth difference.

Abstract: The present invention relates to an arrangement (100) for a sailing boat furling system, and for reception of or comprising an outgoing shaft (11) exposed to external torque loads. It comprises a furling drive unit (20) with a gear mechanism (22) and a motor unit (23) connected to an ingoing, motor, shaft (21) and a ratchet mechanism (10) comprising a locking functionality. The ratchet mechanism comprises a housing (17A,17B) and takes up the outgoing shaft (11). The furling drive unit (20) is connectable to ratchet mechanism (10) and is so arranged that the motor unit (23) will be located distant from the outgoing shaft (11), and it further comprises a control unit (30) arranged to control the motor unit (23) driving the ingoing shaft (21).

Abstract: A field configurable autonomous vehicle includes modular elements and attachable components. The vehicle can be assembled from these modular elements and components to meet desired mission and performance characteristics without the need to purchase specially designed vehicles for each mission. The main body of the vehicle is a spherical body.

Abstract: A projectile launch detector, including a body, a mast and a blade rigidly connected to the mast; the mast being capable of sliding between a retracted configuration and a deployed configuration, and capable of pivoting between a first and a second angular position. The detector may further includes a first elastic return element to return the mast to the deployed configuration relative to the body; and a first associated sensor; and a second elastic return element to return the mast to the first angular position relative to the body; and a second associated sensor.

Abstract: A transmission system for a hybrid power plant, such as a hybrid propulsion system of a marine vessel, is described. The transmission is configured to selectively couple a primary mover and/or a secondary mover to an output of the transmission for providing a power output, and optionally selectively couple the primary mover to the secondary mover, decoupling the output, for electrical energy generation in a compact and light-weight design.

Abstract: Equipment for the conversion of a sailboat hull, having a substantially rectangular cockpit, into a rowing boat includes a frame that is substantially rectangular. Such frame is shaped to be arranged with the two major sides at the two major sides of the cockpit and is provided with a removable locking system of the frame to the hull of the boat. Two cantilever members jut out beyond the sides of the hull and are connected to the frame at one end and are provided with rowlocks on the other end. A seat is also provided, slidable along at least one couple of guides parallel to the major sides of the frame.

Abstract: A method is for making a marine drive for propelling a marine vessel in water. The method includes providing a gearcase; installing a propeller shaft assembly that extends forwardly from the gearcase; coupling front and rear propellers to the propeller shaft assembly, forwardly of the gearcase, such that rotation of the propeller shaft assembly causes rotation of the front and rear propellers, respectively, which thereby propels the marine vessel in the water; and reducing deleterious effects of cavitation on the gearcase by the combination of forming the gearcase with a wide trailing end portion, in particular to maintain pressure alongside the gearcase, and configuring the front and rear propellers so that the front propeller absorbs more torque/thrust load than the rear propeller during said rotation.

Abstract: The present invention comprises a device for acting on water flow as a watercraft moves through the water. The device is generally comprised of a primary plate having two downward angled tabs and a handle. Device is installed on the stern of watercraft, preferably engaged to a prior art ladder. The angular tabs and primary plate delay a portion of the wake from reaching the surface of the water, thereby allowing time for the converging water flow from either side of the watercraft to merge more seamlessly with the wake. This convergence creates a more laminar surf wave.

Abstract: A method and an arrangement for sealing a propeller shaft located under water. The propeller shaft is arranged at a pod of a ship and an air chamber is provided circumferentially around the propeller shaft. The method includes supplying compressed air from a compressed air source to the air chamber, discharging compressed air from the air chamber in an air return line and colleting liquid present in the compressed air discharged from the air chamber in an intermediate leakage tank that is provided in the air return line. The method includes closing the air return line upstream of the intermediate leakage tank, and supplying compressed air to the intermediate leakage tank to effect flowing of liquid present in the intermediate leakage tank to a leakage tank.

Abstract: The present application discloses an automatic water surface skimmer, belonging to the technical field of water surface cleaning. For the existing anti-collision structure, most of impact force is transmitted to a hull through an anti-collision wheel, resulting in that the anti-collision wheel and the hull are damaged, the anti-collision effect is poor, and the service life of the anti-collision wheel and the hull is influenced. Further, garbage collected by adopting the existing solution is easily scatteredly fallen from an opening, and the collection effect is not good. The body of the automatic water surface skimmer is provided with an accommodating cavity running through upper and lower portions, such that a storage member can be placed from the top to the bottom, and it is convenient for a user to disassemble and assemble the storage member.

Abstract: A system for deploying and recovering an autonomous underwater device (AUD) using a surface carrier ship, includes, in addition to the carrier ship, a subaquatic vehicle (SV) guided by a connection wire connected to the carrier ship, the SV able to be positioned in a storage configuration wherein the SV is fixedly but removably joined to the carrier ship in a storage zone, or in a configuration for use, in which the SV, separated from the carrier ship, is in the water and at a distance from the carrier ship while remaining connected by the connection wire, the SV including propulsion, guiding and stabilizing systems and a station for receiving the AUD allowing it to be removably attached to the SV, the receiving station and the AUD including a complementary automated docking unit allowing the AUD to automatically dock with the receiving station during recovery and attach itself thereto.

Abstract: Watersport board fins with fin retention systems and associated watersport boards and methods. A fin includes a hydrodynamic blade and a fin base extending from the hydrodynamic blade. The hydrodynamic blade defines a fin plane and includes a leading edge, a trailing edge, and a foil surface. The fin further includes a fin retention system with a selective retention system that includes a retainer and an actuator coupled to the retainer via a pivot shaft. The actuator forms a portion of the hydrodynamic blade when the selective retention system is in a locked configuration and is configured to rotate away from the fin plane when the selective retention system transitions from the locked configuration to an unlocked configuration. The retainer is configured to rotate away from the fin plane when the selective retention system transitions from the unlocked configuration to the locked configuration.

Abstract: The present invention relates to a system for attaching a device to an object, comprising: an attachment device for attaching the device to an object, the attachment device having a trigger for triggering activation of the attachment device; a releasable coupling device for releasably coupling the attachment device to a deployment system. The releasable coupling device comprising: a housing; a trigger system, configured to trigger the attachment device trigger; and a retaining system, configured to releasably retain the attachment device. The releasable coupling device is configured such that: in a first configuration, the trigger system is in a disarmed state; in a second configuration, the trigger system is in an armed state, such that movement of the attachment device relative to the housing of the releasable coupling device activates the trigger of the attachment device; and in a third configuration, the retaining system releases the attachment device.

Abstract: Various aspects include a robot including a chassis, a rear section, and a forward propulsion auger. The chassis may include a forward section; a first drive motor positioned within the forward section; a rear section; and a maneuvering gimbal. The forward propulsion auger may be positioned on a leading end of the forward section and coupled to the first drive motor. The forward propulsion auger may include at least one fluid nozzle configured to eject a fluid therefrom for fluidizing at least a portion of a viscous mixture. The forward section and the rear section may be configured to be selectively pivoted relative to one another about the pivot axis of the maneuvering gimbal. Also, the forward propulsion auger may be configured to be rotated by the first drive motor relative to the forward section about a rotational axis normal to the pivot axis of the maneuvering gimbal.

Abstract: Described is a system for neutralising underwater explosive devices including an apparatus for identifying a naval mine, a source for emitting an acoustic signal for signalling the position of the naval mine, a first underwater vehicle designed to place the source for emitting an acoustic signal close to the naval mine, a measurement apparatus designed to determine a first distance between the source of emission of an acoustic signal and the naval mine.

Abstract: An improved support for a fin extending downwardly from the undersurface of a water sport board provides detented rotational positioning of the fin at a selected one of a plurality of angular positions including a vertical position for use, a right side position and a left side position both of which protect the fin from damage during periods of nonuse, transport and storage and which avoid the need for removal and reattachment of the fin between periods of use and periods of nonuse, transport and storage.

Abstract: A buoyancy tank for a portable floatation apparatus which allows for the elevation of a watercraft above a water-line and which allows for the removal of the watercraft from a body of water. The buoyancy tank has at least one and/or a plurality of integrated cylindrical structures which supports the floatation apparatus in transport and storage. The integrated cylindrical structures provide sufficient support to allow the removal of the floatation apparatus by use of a boat lift and further provide sufficient support to allow a watercraft to be stacked on top of the floating apparatus while the floating apparatus is stacked on top of the floating apparatus for the purposes of storage. A plurality of said buoyancy tanks may be connected to the portable floatation apparatus by use of connecting means.

Abstract: Disclosed is a hull device designed to be reversibly attached to an outer surface of a ferromagnetic structure of a marine or submarine system or vessel. The device includes at least one attachment surface suitable for attaching the device to the structure, and a plurality of permanent magnets arranged in the vicinity of the attachment surface in order to attach the device to the structure.