Abstract: A system is provided that determines the length of an optical fiber unwound from or remaining on at least one storage reel. The fiber is used as a medium for transmitting information between a weapon and an underwater vehicle, from which the weapon was fired. The determination system measures the backscattered light power in the fiber, analyzes this power signal in order to detect a backscattered light power discontinuity that corresponds to the location of the fiber where the fiber leaves the reel, localizes this location along the fiber, and determines from this localization and from the length of fiber initially wound on the reel, the length of fiber unwound from or remaining on the reel.

Abstract: This offshore installation for producing electrical energy from thermal energy of the oceans includes a floating platform supporting a generator for producing electrical energy from the temperature difference of the water at the surface and at a depth and associated with a pipe for drawing up water from a depth, is characterized in that the pipe for drawing up water from a depth include three portions, including a first formed with a rigid pipe, the lower end of which is immersed at a great depth and the upper end of which is immersed in midwater at a reduced depth, a second portion formed with flexible pipes for connecting the upper end of this rigid suction pipe to a third portion forming a suction pipe, formed with rigid pumping pipes structuring a lattice of pipes attached under the platform.

Abstract: The invention relates to an underwater electricity generation module provided with a base. The electricity generation module is of the type that comprises an elongate cylindrical casing (12) incorporating an electricity generation unit (25a, 25b) comprising a nuclear boiler (28, 29) associated with electricity generation means (30, 31) connected to an external electricity distribution post (7) by means of electric cables (6). The lower portion of the casing (12) is provided with a base (14) that rests on the bed of the water body and anchoring means (15) for anchoring the module (1) to the bed. The invention is characterised in that the base (14) is essentially in the form of a sledge which extends from one end of the casing (12) to the other and the ends (50, 51) of which are curved in the form of a spatula at each end of the casing (12), said base including zones for absorbing variations in the length of the casing (12), linked to the variation in the pressure applied thereto when submerged or surfaced.

Abstract: A method of taking a plurality of measurements of the magnetic field using the plurality of sensors; includes assessing the inductive magnetic excitation; and determining the likely distribution of magnetic sources on the surface of the hull by resolving a system of equations derived from modeling the physical phenomena at play, on the basis of the plurality of measurements taken and the assessed inductive magnetic excitation. The model describes the induced magnetic sources as a distribution of dipolar sources and the remanent magnetic sources as a distribution of monopolar sources. A device (6) for determining the magnetization of the hull of a ship for implementing the method is also described.

Abstract: A ship hull includes at least one float (10) and a center of buoyancy (CB) situated behind the center of flotation. (CF), the distance between the center of buoyancy and center of flotation is greater by 5% than the waterline length L of the hull.

Abstract: An underwater electricity generation module includes an elongate cylindrical casing (12) incorporating an electricity generation unit (25a, 25b) including a nuclear boiler (28, 29) associated with electricity generation elements (30, 31) connected to an external electricity distribution post by element of electric cables. The invention is characterised in that it includes two electricity generation units (25a, 25b) disposed symmetrically on each side of a central transverse plane of the casing (12) along the longitudinal axis thereof.

Abstract: This floating support for an offshore structure such as a wind generator in particular, of the type including an element in the form of a support mast (16), the upper part of winch is associated with the structure and the lower part of winch is associated with elements (18) in the form of float and with ballast-forming elements (17), is characterized in that the elements (18) in the form of a float have an overall shape winch widens out from the lower part of the element (16) in the form of a mast, allowing two stable positions of the support to be defined, one of the positions being a lying-down position and the other a position standing up on the elements in the form of a float.

Abstract: The disclosure relates to a system for loading/unloading a vehicle into/from a carrier ship through at least one opening provided in the rear of said ship comprising an angled vehicle-receiving ramp combined with a motor-driven means for loading/unloading the vehicle, characterized in that the motor-driven means for loading/unloading the vehicle comprises a crossbeam-shaped means for the ship that extends above the ramp and is combined with a vehicle-hoisting/releasing cable, which is in turn combined with a first drive means for hoisting/releasing the vehicle, and in that the crossbeam-shaped means is longitudinally movable, by means of a second drive means above the ramp, between a rear position for hoisting/releasing the vehicle and a front position for storing the vehicle on the ramp in the ship.

Abstract: A method of identifying and optionally neutralizing an undersea object (1, 1?) that might be an undersea mine and that is of known geographical position, in which an undersea intervention robot (4, 4?) is used suspended under an aircraft capable of stationary flight, such as a helicopter (7) or a drone, serving to bring the robot (4, 4?) into register with the object (1, 1?) for identification and possibly for being neutralized, the object is identified, and optionally it is neutralized.

Abstract: The invention relates to a floating periscope in particular for an underwater vehicle, comprising a floating container (5) having an elongate shape, one end of which is adapted to project above the water level and having means (6) for filming the environment, supported by a stabilized platform (8) which is in turn supported by gimbal suspension means (11), characterized in that the stabilized platform (8) is combined with at least one stabilizing rod (9) extending along the longitudinal axis of the container (5) and one end of which is combined with means forming a counterweight (10) for position stabilization.

Abstract: A device generating hydrogen from a hydrocarbon, oxygen and water. The reaction is carried out at high temperature. The device includes a first substantially cylindrical zone surrounding the reaction chamber circulates water vapor and hydrocarbon, excluding the reaction products, the zone being separated from the reaction chamber to recover heat lost by the reaction chamber, to preheat the mixture circulating in the first zone. The reagent(s) are in contact with the walls of said first zone to exchange produce heat. A substantially cylindrical second zone surrounds the first zone and circulates water to be vaporized, the water is in contact with the walls of said second zone. The first and second zones are separated such that water circulating in the second zone is preheated by heat of the first zone where the water of the second zone is mixed with the hydrocarbon and introduced into the first zone.

Abstract: Device for launching missiles from a ship, includes at least one missile launch ramp, includes a ditch delimited by side walls of which at least two constitute bulwarks which extend around the periphery of the ship, the ditch being open above the exterior deck of the ship, in that the launch ramp is positioned in the ditch so it can be used to launch a missile over a lateral bulwark of the ditch extending around the periphery of the ship. It includes an element for discharging the missile propulsion gases including a duct opening onto an orifice in a lateral bulwark of the ditch extending around the periphery of the ship, and the lateral bulwarks of the ditch are of a height tailored to conceal the missiles in place on the ramp, for angles of incidence of between 0 and ?5° with respect to the deck of the ship.

Abstract: A system is provided that determines the length of an optical fiber unwound from or remaining on at least one storage reel. The fiber is used as a medium for transmitting information between a weapon and an underwater vehicle, from which the weapon was fired. The determination system measures the backscattered light power in the fiber, analyzes this power signal in order to detect a backscattered light power discontinuity that corresponds to the location of the fiber where the fiber leaves the reel, localizes this location along the fiber, and determines from this localization and from the length of fiber initially wound on the reel, the length of fiber unwound from or remaining on the reel.

Abstract: An anchoring harpoon (1) intended in particular for an aircraft, capable of cooperating with an anchoring grate (2) of a platform, includes a jack member (3) including a cylinder element (4) containing a mobile piston element (5) provided with a rod (6) that extends beyond the cylinder element, the free end of which includes a harpoon head (7) that is hooked in the grate and includes retaining fingers (8, 13, 14) that can be moved between a retracted position and an active position by control elements (9). The jack member is connected to a pressurized fluid source (30) by the control elements (31) and the pressurized fluid source includes a consumable gas cartridge (30).

Abstract: The invention relates to a submarine comprising a device for producing electricity including a fuel cell, means for feeding oxygen gas, means for feeding hydrogen fuel, and means for discharging the gas effluents, characterized in that the fuel cell (24) is an internal reforming cell operating at a high temperature and pressure (P), the operating pressure being greater than or equal to a submerged pressure (P0) of the submarine (2), in that the oxygen gas (11) feeding means and the hydrogen fuel feeding means (15, 115) are capable of bringing the oxygen gas and the hydrogen fuel to a pressure adapted to the operating pressure, and in that the effluent (20, 220) discharge means are capable of discharging the effluents outside the submarine during diving.

Abstract: This system for guiding a drone during the approach phase to a platform, particularly a naval platform, with a view to landing the same, is characterized in that the platform is equipped with a glide slope indicator installation emitting an array of optical guide beams over an angular sector predetermined from the horizontal, and in that the drone is equipped with a beam acquisition camera connected to image analysis means and to computing means of orders for commanding automatic piloting means of the drone to cause it to follow the guide beams.

Abstract: An anchoring harpoon intended in particular for an aircraft, capable of cooperating with an anchoring grate of a platform, includes jack elements including a cylinder element containing mobile piston elements provided with a rod that extends beyond the cylinder element, the free end of which includes a harpoon head (7) that is hooked in the grate and includes retaining fingers (8, 13, 14) that can be moved between a retracted position and an active position by control elements (9). The control element (9) for controlling the movements of the fingers include a control piston (18) which can slide inside the rod of the jack and which is associated with a bistable actuator (19) of the fingers, capable of moving between a retracted position and an active position in which the fingers are deployed with the application of successive pressure pulses in the jack elements.

Abstract: An electrical cell for the propulsion of a device in an aquatic medium includes a first, second and third chamber forming a housing. The first chamber has an auxiliary electrical cell and a command and control module for the electrical propulsion cell, the second chamber a main electrical cell and members for the controlled admission and regulation of water flow from the aquatic medium in order to form an activation electrolyte for the main cell, and the third chamber a module for triggering the admission by suction of water and the discharge by escape of effluents from an admission valve and an escape valve. The command and control module activates the auxiliary electrical cell to generate electrical energy temporarily and the admission by suction of water from the aquatic medium and the discharge of effluents in order to produce electrical energy from the main electrical cell during a cruise phase.

Abstract: The invention relates to an armed stealth surface vessel (1) comprising a hull (2), a deck (5, 6) and superstructures (3). The inventive vessel is equipped with sensors, transmitters, arms and, optionally, handling means. The invention is characterized in that the outer casing (4) of the deadworks comprises walls which are all inclined inwards such that the outer faces thereof are oriented upwards and form an angle that is greater than or equal to 20° with the vertical at least above a line located 5 m above the waterline and, along at least 50% of the length of the vessel, above a line located less than one meter above the waterline. The invention is also characterized in that that the essentially-vertical joint lines between two adjacent walls are inclined inwards and form an angle of more than 20° with the vertical. The invention is further characterized in that the sensors and transmitters, the arms and the handling means are concealed or can be concealed in or under the outer casing of the deadworks.

Abstract: A harpoon head (6) for a system for anchoring an aircraft on a grating (4) is characterized in that a distal end of the harpoon head has an interchangeable insert (20).