Abstract: The invention relates to an underwater work system 1 with at least one autonomous unmanned underwater vehicle 2 and one unmanned relay vehicle 4 floating at the surface of the water 3, which comprises a radio antenna 5 for external communication 26 and a drive 16. The underwater vehicle 2 is connected to the relay vehicle 4 via an internal communication device. The invention furthermore relates to a method for operating an underwater work system. In order to create an underwater work system with an autonomous underwater vehicle and an unmanned relay vehicle floating at the surface of the water as well as a method for operating such an underwater work system, which provides an increased efficiency of the autonomous underwater vehicle 2 with short mission times, it is provided according to the invention that the relay vehicle 4 is controllable by means of a control unit 16 via the at least one autonomous underwater vehicle 2 in due consideration of navigation information 17.

Abstract: The invention relates to a method of classifying one or several watercraft using the sound waves emitted or transmitted by these vehicles. The sound waves are thereby received using an array of underwater sound sensors of a sonar receiving system and processed into received signals. At least one amplitude spectrum is generated from these received signals consisting of one or more sets of frequency lines and any individual lines, from which the characteristic vehicle parameters are automatically determined in a frequency line pattern detection module or determined manually. Subsequently, the vehicle characteristic parameters are compared with the database parameters, where this comparison is evaluated with a matching factor. Considering the matching factor, one or several watercraft are determined as the result of the classification. In addition, the invention relates to a corresponding device for carrying out the process.

Abstract: The invention relates to an acoustic converter (101), in particular a hydrophone (103), comprising an interferometer and an associated first vibration element (151, 251), which is maintained by a support. Said interferometer comprises a light source (111), a first signal beam (113), a signal beam splitter, a first reference beam (115), a first scanning beam (117), a first measuring beam (119) and an optical sensor (141). Said light source emits the first signal beam and the first reference beam and the first measuring beam are superimposed onto the optical sensor. The first scanning beam is directed to the first vibration element and the first measuring beam causes a Doppler shift with respect to the first scanning beam based on a vibration of the first vibration element, characterized in that the first vibration element is arranged in a first liquid.

Abstract: The invention concerns a group of vessels (24), having an unmanned surface vessel (3) and an unmanned underwater vessel (1, 1a), wherein the underwater vessel comprises a location device, in particular a sonar device, for sensing location data (12) in the underwater area and one evaluation unit or more evaluation units, and the evaluation unit or the evaluation units are arranged in such a manner that these comprise detection means (20) for detecting (14) a contact (MILEC) with the aid of the sensed location data (12) and with classification means (21) for classifying (15) the detected contact (MILEC) as a mine-like contact (MILCO) or non mine-like contact (NONMILCO), whereby classification is accomplished by comparing the contact (MILEC) with known mine information so that a mine-like contact (MILCO) can be identified as a mine contact (MINE) or as another object (NOMBO).

Abstract: The invention relates to a sea container that can be closed on all sides, comprising a base frame, which has four corner posts, a top-side frame, and a bottom-side frame construction, wherein the corner posts are rigidly connected to the top-side frame and to the bottom-side frame construction. The bottom-side frame construction has a bearing frame, wherein installations in the container are fastened to the bearing frame and the bearing frame has tie-down means for tying down and for absorbing forces acting horizontally. Thus the invention makes it possible to accommodate installations such as a deploying device for a trailling antenna in a sea container even though traditional sea containers are unsuitable therefor.

Abstract: An apparatus and a method for the binaural reproduction of audio sonar signals, which can be direction-selectively received by a sonar system having a receiving antenna provided with a plurality of transducers, and at least one direction generator, and which can be modified by binaural audio signal processing. The apparatus comprises a portable sound reproduction device, particularly a headphone, and a head tracking sensor connected to the sound reproduction device for registering position changes of the sound reproduction device. Signals, associated with the position changes, are generated, which are transferred to the direction generator, in order to select a direction of the sound waves to be received.

Abstract: The present disclosure provides a method for clearing weapons that have been sunk in waterways using a weapon clearance appliance. The weapon clearance appliance comprises means for detachable connection to an unmanned underwater vehicle, so that the underwater vehicle is a safe distance away when the weapon is detonated. The volume of the weapon clearance appliance is chosen such that the buoyancy force which acts on the weapon clearance appliance under water compensates for the force of gravity acting on the weapon clearance appliance. Therefore, the weapon clearance appliance has neutral buoyancy, as a result of which, after the weapon clearance appliance has been released from the underwater vehicle, there is no need to retrim the underwater vehicle. Therefore, there is no need for trimming devices on the underwater vehicle.

Abstract: A towed array sonar system 10 with a towed array 14, a deployment device 32 for respectively deploying and retrieving the towed array 14 into and from a body of water, a signal processing device 28 for processing the signals of the towed array 14 and at least one control console 30 for controlling the towed array sonar system 10. In order to create a mobile sonar system that can be deployed independently of a ship, the towed array 14, the deployment device 32, the signal processing device 28 and the control console 30 are installed in a container 12 that can be transported independently of a ship. The invention furthermore pertains to a method for carrying out a sonar mission using such a towed array sonar system 10.

Abstract: A method for determining the proximity to an electrically conductive body comprises transmitting an alternating magnetic field at a selected frequency and registering an alternating magnetic field. Frequencies of the registered alternating magnetic field comprising the selected frequency and have an amplitude value above a predefined threshold value and are detected by a detection means. Utilizing a blocking circuit, frequencies of a predefined frequency band comprising the detected frequency or a plurality of predefined frequency bands comprising in each case one of the detected frequencies, are defined as blocked frequencies. A following frequency following the respective selected frequency and different from the selected frequency and the blocked frequencies is defined in a selection controller. The following frequency of a selected frequency is continuously selected as a newly selected frequency for a new time window following immediately after or chronologically spaced apart from a selected time window.

Abstract: The invention relates to a device and a method for recovering an unmanned underwater vehicle. In order to ensure a safe recovery of an unmanned seconder underwater vehicle 2 by the primary underwater vehicle 1, the invention provides a recovery into a tender garage 4 for receiving the underwater vehicle 2 wherein the underwater vehicle 2 is centered in an entrance area 7 in front of a gate 5 of the tender garage 4 by means of at least one positioning current 8, which is generated outside of the peripheral area of the gate 5 and is oriented toward the entrance area 8. The underwater vehicle 2 is subsequently introduced into the tender garage 4.

Abstract: The present disclosure provides a method for clearing weapons that have been sunk in waterways using a weapon clearance appliance. The weapon clearance appliance comprises means for detachable connection to an unmanned underwater vehicle, so that the underwater vehicle is a safe distance away when the weapon is detonated. The volume of the weapon clearance appliance is chosen such that the buoyancy force which acts on the weapon clearance appliance under water compensates for the force of gravity acting on the weapon clearance appliance. Therefore, the weapon clearance appliance has neutral buoyancy, as a result of which, after the weapon clearance appliance has been released from the underwater vehicle, there is no need to retrim the underwater vehicle. Therefore, there is no need for trimming devices on the underwater vehicle.

Abstract: The invention relates to a device and a method for recovering an unmanned underwater vehicle. In order to ensure a safe recovery of an unmanned seconder underwater vehicle 2 by the primary underwater vehicle 1, the invention provides a recovery into a tender garage 4 for receiving the underwater vehicle 2 wherein the underwater vehicle 2 is centered in an entrance area 7 in front of a gate 5 of the tender garage 4 by means of at least one positioning current 8, which is generated outside of the peripheral area of the gate 5 and is oriented toward the entrance area 8. The underwater vehicle 2 is subsequently introduced into the tender garage 4.

Abstract: The invention relates to a protective housing for a propeller of a submarine vehicle. The invention also relates to a connection system for a propeller-driven submarine vehicle with a submarine cable and such a protective housing. The invention further relates to the use of a protective housing for a propeller of a submarine vehicle for receiving a strain relief connection for a connecting cable. The invention enables low-cost communication between a propeller-driven submarine vehicle and a support platform by means of a connecting cable which is hydrodynamically streamlined and ensures strain-relief for the connecting cable. The connecting cable is fixed to the periphery of the protective housing, outside the working space of the propeller located on a propeller axis, and a strain-relief cable-holding fixture is arranged for a connecting cable on the submarine vehicle.

Abstract: A method for manufacturing an optical fiber spool includes winding a coil of an optical fibers up in the form of a cross-winding such that several layers of the optical fiber are formed that lie on top of one another. The optical fiber has a surface that respectively features contact areas between adjacent layers. Elevations are produced on the surface to create intermediate spaces between the elevations. The elevations are distributed so that in the region of one of the respective contact areas, at least one of the elevations of one of the adjacent layers of the respective contact area engages into at least one of the intermediate spaces of the other adjacent layer to of the same contact area. An optical fiber spool with a self-supporting coil of an optical fiber can be produced.

Abstract: The invention relates to a salvaging device and a salvaging method for salvaging condensed matter, such as an underwater vehicle, located on the water surface of a waterway. The salvaging device is an unmanned watercraft and comprises a boat hull with a maneuvering means and with a carrier device as well as a salvaging receptacle fastened to the boat hull. The watercraft is maneuvered in a self-driven manner on the water surface and collects the condensed material into the salvaging receptacle where the collected matter is stored. A crane of a supply ship then lifts the salvaging device and stored condensed matter out of the waterway. The invention permits the salvaging of the condensed matter, e.g., an underwater vehicle, with a reduced risk of damage to the condensed matter, as well as with a reduced risk to personnel who do not need to enter the water for this purpose.

Abstract: An unmanned underwater vehicle and a method for recovering an unmanned underwater vehicle. The unmanned underwater vehicle (1) is recovered by releasing a recovery buoy (21), which is connected to the vehicle (1) by a recovery line (22), recovering the recovery buoy (21) from the surface, attaching the recovery line (22) to a recovery system and lifting the vehicle (1) by the recovery system and the recovery line (22). To provide a safe recovery of the unmanned underwater vehicle under most weather condition, the vehicle (1) is submerged after releasing the recovery buoy (21) by reducing the buoyancy of the vehicle (1) and providing negative net-buoyancy (29).

Abstract: Unmanned underwater vehicles (1) which can be controlled from a carrier platform (2) by an optical waveguide cable (3) can be used for widely differing missions. For mine countermeasures, the loss of the underwater vehicle (1) is often accepted, with the optical waveguide cable (3) also being destroyed by the explosion. To reduce the costs of a mission of the underwater vehicle, the invention provides for the optical waveguide cable (3) to be connected to the underwater vehicle (1) via a connecting device (4). The connecting device (4) comprises a connecting cable (8) and connecting elements (11, 12) at the ends (9, 10) of the connecting cable (8) for an optical waveguide cable (3) at one end and for an unmanned underwater vehicle (1) at the other end.

Abstract: A method for detecting anomalies on a submarine object, in particular in the submarine region on a hull of a moored warcraft, which method carries out very reliable sensing of the submarine object by way of an unmanned small submarine vehicle that is equipped with simple sensor equipment, such as an acoustic sensor for measuring distances and a barometric cell for determining depth, and which method obtains a profile of the submarine object by navigating the small submarine vehicle with a constant transversal distance to the submarine object, in which profile an anomaly present on the submarine object becomes is apparent from the profile line.

Abstract: The disclosure provides a weapon clearance device for clearing weapons by detonating the weapon, a combined weapon clearance device comprising the weapon clearance device and an unmanned underwater vehicle, and a method associated therewith for clearing weapons. The weapon clearance device comprises a retaining device for fixing the weapon clearance device to the weapon or in the surrounding area of the weapon. The weapon clearance device is a driveless attachment for the unmanned underwater vehicle comprising a means for the releasable connection to the unmanned underwater vehicle. The mass of the weapon clearance device under water is invariably less or greater than the mass of the water displaced by the weapon clearance device under water. The weapon clearance device is thus not neutral in terms of buoyancy, which provides advantages when clearing sunk ground mines as well as floating mines by approaching the mine from above and/or from below.

Abstract: The invention relates to a weapon clearance appliance for clearing weapons, such as underwater mines or munitions which have been sunk in waterways, under water by detonation of the weapon. In this case, the weapon clearance appliance is provided with means for detachable connection to an unmanned underwater vehicle, so that the underwater vehicle is a safe distance away when the weapon is detonated. In order to allow the use of conventional small underwater vehicles, the volume of the weapon clearance appliance is chosen such that the buoyancy force which acts on the weapon clearance appliance under water compensates for the force of gravity acting on the weapon clearance appliance. Therefore, the weapon clearance appliance has neutral buoyancy, as a result of which, after the weapon clearance appliance has been released from the underwater vehicle, there is no need to retrim the underwater vehicle. There is therefore no need for trimming devices on the underwater vehicle.