A weaponized UUV has a sliding barrel and accessible breech. The barrel slides in response to the firing of a projectile, and moves a first distance un-arrested, providing time for the projectile to clear the barrel. After the projectile clears the barrel, a recoil mechanism engages the barrel, transferring the recoil load to the hull of the UUV.

An unmanned undersea vehicle includes one or more vehicle sections. The sections include a vehicle hull. The vehicle includes a data crypt configured to be selectively removable from the vehicle through the hull of the vehicle. The data crypt includes a persistent storage device configured to operate using SATA protocols and one or more electrical connectors configured to selectively connect the data crypt to electrical equipment in the vehicle, wherein the connectors are impedance matched to mating connectors in the vehicle.

A quick release bow clamp comprising a hinged circular body having a vehicle mating flange and a nose cone mating flange configured to selectively attach to an access plate on the bow of an underwater vehicle and a nose cone for the same, respectively. The flanges of the bow clamp and the corresponding flanges of the access plate and nose cone may include an intermittent pattern of open and solid portions for weight reduction. The bow clamp may also include a quick release clamp having an adjustable draw latch configured to attach to a clip on the body of the bow clamp and a safety latch configured to prevent the draw latch from inadvertently disengaging with the clip.

A task such as inspection is performed at a subsea location by positioning a functional unit such as an unmanned underwater vehicle to perform the task. When positioned to perform the task, the unit is then in a shadow region where wireless control signals from a subsea control transmitter are obscured by a subsea obstacle. Consequently, control signals arre transmitted wirelessly through water from the control transmitter to an autonomous underwater vehicle (AUV) positioned outside the shadow region and are relayed from the AUV to the unit to control the unit to perform the task. The unit can be tethered to the AUV or can communicate with the AUV wirelessly. The AUV can move itself to improve wireless communication with the subsea control transmitter and optionally also with the unit.

A power transmitting device transmits power to a power receiving device having a power receiving coil, in water. The power transmitting device includes one or more annular transmitting coils including a power transmitting coil configured to transmit the power to the power receiving coil via a magnetic field, a support member located in an inner space of the transmitting coil, which is formed by the annular transmitting coil, the support member including an outer periphery along an inner periphery of the annular transmitting coil, and supporting the transmitting coil from the inner space, a power transmitting unit configured to supply A/C power to the power transmitting coil, and a capacitor connected to the transmitting coil, and forming a resonance circuit resonating together with the transmitting coil.

Systems and methods for launching and retrieving payloads in aquatic environments employ a platform that is both floatable and submersible at the discretion of and/or under the control of a user, on which submersible objects to be launched, delivered to a subsea location and/or retrieved (the payload) may be located. The submergible platform has a plurality of sealed and/or sealable buoyancy chambers and at least one low pressure gas storage tank having associated fixtures and valves providing introduction of gas to the buoyancy chambers. A payload docking system providing secure docking of a payload on the platform deck is also disclosed.

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.

A device (110) for performing measurements on a seabed (3), comprises a chamber (111) containing a sensor (120) and a fluid (115) at a constant temperature and at an ambient pressure. This removes the need for calibration in large ranges of both pressure and temperature. In addition, this eliminates the need to wait until the sensor (120) has achieved ambient temperature, and thereby achieves a desired accuracy of the recordings from the sensor while decreasing the operation time. The device preferably comprises an insulating layer (113), an internal temperature stabilising device (130) and a circulating device (131) to ensure a constant temperature and low temperature gradients within the chamber (111). The pressure within chamber (111) may be equalised to ambient pressure by a pressure inlet (112).

A propulsion system for an unmanned underwater vehicle includes a turbine engine, a generator mechanically coupled to an output shaft of the turbine engine, an electrical motor mechanically decoupled from the turbine engine and electrically coupled to the generator via a power bus architecture, and a propulsor mechanically coupled to a rotational output of the electrical motor. The power bus architecture includes a pair of AC buses and a DC bus.

A vehicle capable of taking off and landing vertically and operating in water, land, air and submarine environments includes a fuselage, two main wings, ailerons, a vertical tail, a rudder, a horizontal tail, elevators, a propeller, rotor wings, rotor wing supports, etc. The vehicle has the advantages of adaptability to various environments, good concealment and strong survivability. Compared with a traditional unmanned rotorcraft, the vehicle has longer endurance time and larger load. Compared with a fixed wing UAV, the vertical take-off and landing function makes the work more convenient. Compared with unmanned diving equipment, the vehicle is applicable to richer environments, and can complete designated missions in air, land, water and submarine environments. Compared with a tilt rotor UAV in water, land, air and submarine environments, the vehicle is rapider in switching of various modes and is higher in stability.