An underwater device intended to be deployed in the water, the device includes a set of arms articulated to a support body having a reference axis r, the arms being able to be kept in a furled configuration and able to deploy into a deployed configuration wherein the arms extend about the reference axis r, the arms deploying by distal ends of the arms moving away from the axis r, a set of at least one bending spring stressed elastically in bending when the arms are kept in a furled configuration and able to relax when the arms are released from the furled configuration, the set of at least one bending spring being configured and arranged in such a way as to exert, on at least one of the arms, when the arms are released from the furled configuration, a thrust that instigates the deploying of the arms.

A measurement device intended to be immersed in water, includes a set of arms and a reference axis, the measurement device being able to be in a deployed configuration, the measurement device comprising a set of measurement units borne by arms of the set of arms and each comprising an acoustic-waves sensor, the set of measurement units being configured and arranged in such a way as to generate a torque on the measurement device about the reference axis upon a vertical translational movement of the measurement device in the deployed configuration, the measurement device comprising compensation means configured and arranged in such a way as to generate another torque on the measurement device about the reference axis during the vertical translational movement, the other torque being directed in the opposite direction to the torque and having an intensity less than twice that of the torque.

A life raft system for an aircraft, comprising a storage container; an inflatable life raft that is stored in the storage container in normal operation mode, an inflation device for inflating the inflatable life raft in an emergency mode, and a control unit for activating the inflation device in the emergency mode; wherein the control unit comprises a floatable control buoy with an activation member that is operable for activating the inflation device, wherein the floatable control buoy is provided for operation at a predetermined distance remote from an associated aircraft in an emergency mode.

Disclosed herein is a sonobuoy cartridge percussion apparatus. A sonobuoy cartridge percussion apparatus according to an aspect of the present invention includes: a CO.sub.2 cartridge filled with CO.sub.2 gas; a percussion ram configured to hit one end of the CO.sub.2 cartridge; a spring configured to enable the percussion ram to hit the CO.sub.2 cartridge by applying force to the percussion ram; a CO.sub.2 cartridge fastening body configured such that a spring reception hole is formed therein to enable the spring to be compressed and inserted into the spring reception hole; and a thread-shaped fastening member configured such that one end thereof is wound around the percussion ram and the other end thereof is passed through the spring reception hole, wherein the fastening member compresses the spring, and is fastened to a stop protrusion formed on the CO.sub.2 cartridge fastening body.

The amphibious unmanned patrol vehicle includes a buoy, a waterproof cable and a submersible amphibious vehicle. An end of the waterproof cable is connected to a first controller of the buoy; and another end thereof is connected to a second controller of the submersible amphibious vehicle. A bottom end of the buoy is connected to a top end of the submersible amphibious vehicle which is configured to realize movement and operation of a whole system. The waterproof cable is configured to connect the submersible amphibious vehicle, and the buoy configured to ensure real-time communication between the submersible amphibious vehicle and an external environment during operation of the submersible amphibious vehicle. A height difference between an upper surface and a lower surface of the automatic reeling and unreeling cable device is equal to a thickness of the waterproof cable. The length of the waterproof cable is adjusted automatically in real time.

A deployment module according to the present application enables both compact stowage of a sensor array and expansion of the sensor array into a three-dimensional volumetric array shape that enables improved directionality of the sensors during operation. The deployment module includes a support shell that is configured to retain a cable of the sensor array separately from sensors of the sensor array and an expandable deployment body formed of a superelastic shape memory alloy that uses superelasticity and stored energy for deployment of the sensor array. During deployment, the deployment body is removed from the support shell and the sensors are subsequently pulled out of the support shell. The deployment body then expands and holds the cable to retain the three-dimensional volumetric shape of the deployed array.

A container for housing and launching sonar buoys of class G (sonobuoy) including a casing partitioned into two portions and automatic and simplified valve means to sequentially eject the buoys from the container.

Disclosed is a sonobuoy that houses at least one unmanned vehicle that may be launched from the sonobuoy. The sonobuoy may include a canister, a parachute, an unmanned vehicle, and a launch mechanism. The parachute may be disposed within an interior cavity of the canister proximate to a first end of the canister. The unmanned vehicle may be disposed within the interior cavity of the canister proximate to a second end of the canister. The launch mechanism may be disposed within the interior cavity of the canister and operatively coupled to the unmanned vehicle. The launch mechanism may be configured to launch the unmanned vehicle from the canister. The sonobuoy may further include a launch deployment mechanism that may be configured to orient the canister with respect to a surface after the sonobuoy impacts the surface in order to facilitate the launch of the unmanned vehicle.

According to a first aspect of the present invention, there is provided a reconnaissance and communication assembly, adapted to be launched from a gun barrel into the air. The assembly comprises a carrier (with a cavity) and a payload (within the cavity). The payload is arranged to be controllably expelled from the carrier and once expelled from the carrier, the payload transmits a signal.

A mooring system including a plurality of connected floats and weights being positively buoyant on a water surface and being negatively buoyant at a depth below the water surface. The mooring system also includes a trigger mechanism arranged to reduce the buoyancy of a portion of the connected floats and weights from a being positively buoyant to negatively buoyant to cause the portion of the connected floats and weights to sink below the water surface where the trigger mechanism changes the buoyance of the portion of the connected floats and weights by either adding a weight to one end or separating the end from a buoyant element.