Abrégé

A tether management system (TMS) for subsea operations, said system comprises: an ROV (10) connected to a towable submersible unit (20), said submersible unit (20) having one or more tow cable connections (22) for a tow cable (40) running up to a surface and a tether cable connection for a tether cable (12) running down to 5said ROV (10), and the submersible unit (20) comprises an underwater winch (26), feeding the tether cable (12) in and out according to the need of the ROV (10).Said submersible unit (20) is a towed depressor, without any thrusters, creating downward depressor force in the water, and which comprises depressor flaps (30) for adjustment of the unit's downward depressor force in the water.

Classes IPC  ?

• B63G 8/08 - Propulsion
• B63G 8/14 - Commande de l'assiette ou de la profondeur
• B63B 21/66 - Équipements spécialement adaptés au remorquage sous l'eau des objets ou des navires, p. ex. carénages hydrodynamiques pour câbles de remorquage
• B63C 11/52 - Outillage spécialement adapté au travail sous l'eau, non prévu ailleurs

Abrégé

Free-swimming and remote-controlled net washer (10) for a fish farm net cage, comprising a framework (12) equipped with several thrusters (14) which control the net washer (10) in the fish farming net cage, and several water nozzles (16) for cleaning a submerged net in the fish farm net cage. Said water nozzles (16) are fixed water nozzles with a mouth opening facing from a side surface (20) of the net washer (10), where an ultrasonic transducer (18) is placed adjacent to each water nozzle (16) and arranged to transmit ultrasound to a water jet coming from the mouth opening.

Classes IPC  ?

• A01K 63/10 - Nettoyage des fonds ou des parois de bassins ou de récipients
• B63B 59/08 - Dispositifs de nettoyage des coques des parties immergées à flot
• B08B 3/02 - Nettoyage par la force de jets ou de pulvérisations
• B08B 3/12 - Nettoyage impliquant le contact avec un liquide avec traitement supplémentaire du liquide ou de l'objet en cours de nettoyage, p. ex. par la chaleur, par l'électricité ou par des vibrations par des vibrations soniques ou ultrasoniques

Abrégé

A system for subsea operation is described, comprising a free swimming, submersible garage and docking station (10,10'), and also an associated free swimming ROV (50), where the garage and docking station (10,10') comprises a framework (14) arranged to function as a garage (40) or docking (40') for the free swimming ROV (50), and where the submersible garage and docking station (10,10') comprises at least equipment in the form of several thrusters (16,18) for operation in the vertical and horizontal directions, respectively, units and a steering system for positioning in the water, and also a winch (12) connected to said ROV (50) via a cable (34) for the transfer of electricity and signals. The framework (14) of the garage and docking station (10,10') is manufactured from a material with buoyancy, and where the buoyancy of the framework is determined by the weight of the equipment mounted in the framework (14), so that a neutral or approximately neutral buoyancy in the water is provided for the garage and docking station (10,10').

Classes IPC  ?

• B63C 1/12 - Bassins adaptés à des navires particuliers, p. ex. sous-marins
• B63G 8/00 - Navires submersibles, p. ex. sous-marins

Abrégé

A chain link testing apparatus (10) for testing links (70) of chains (80) includes a sensor arrangement (60, 100) for inducing one or more eddy current resonances (350, 360) in one or more links (70) of one or more chains (80) and for performing measurements of the one or more eddy current resonances (350, 360) at a plurality of time intervals for determining a mechanical status and/or a temporal change in mechanical status of the one or more links (70). The apparatus (10) is capable of being operated in an underwater environment (20). The sensor arrangement (60) includes a magnetic circuit (210A, 210B) which is magnetically couplable to the one or more links (70) when in a closed state, and movable between the one or more links (70) when in an open state. Moreover, the magnetic circuit (210A, 210B) is implemented to include one or more elements (210A, 210B) which are operable to be actuated to encircle a portion of a given link (70) when being tested.

Classes IPC  ?

• G01N 27/90 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la présence des criques en utilisant les courants de Foucault

Abrégé

A method and a device are described for survey of an ocean floor, and also cables and the like on the ocean floor in ocean areas with strong currents, as a submersible survey platform (10) is lowered from a surface vessel with the help of a winch system (12) on the vessel to a desired distance in relation to the ocean floor. The desired fixed distance from the ocean floor is controlled in real time in relation to the topography of the ocean floor at the same time as the vessel moves forward to drive the platform (10) along a desired trajectory with the help of one or more sensors that register the distance to and possibly direction towards the ocean floor and which are connected to the winch (12) via a control system (14). At the same time, sideways movements of the platform (10) caused by currents are compensated for with the help of one or more sensors that are connected to a number of thrusters (16) on the platform (10) via said control system (12).

Classes IPC  ?

• B63C 11/42 - Chambres de plongée reliées mécaniquement à une base, p. ex. par un câble du type fermé avec commande indépendante de propulsion ou de direction
• B63G 8/00 - Navires submersibles, p. ex. sous-marins