Ships for navigating in icy waters having improved propulsion performance in open water and at the same time good maneuverability forward in icy waters are provided. Such ships include those having a bow area with a bulb adapted to generate a bow wave in phase opposition with respect to that generated by the ship's hull.

Ships for navigating in icy waters having improved propulsion performance in open water and at the same time good maneuverability forward in icy waters are provided. Such ships include those having a bow area with a bulb adapted to generate a bow wave in phase opposition with respect to that generated by the ship's hull.

Icebreaker (10) for a vessel (12), where the icebreaker (10) is connected to a bow (12a) of a vessel (12) for breaking up solid ice (40) floating on a water surface, the icebreaker (10) comprises a central part (14) sliding on a first side of the ice (40) and two or more side parts (16) sliding on an opposite part of the ice (40). The centre part (14) and the side parts (16) extend in parallel forward and works against each other when breaking the ice (40) to prevent the ice (40) from lifting, wherein a lower edge of the side parts (16), being in contact with the ice (40), is narrow and sharp to initiate breaking lines (50) in the ice (40), and the centre part (14) comprises a forward protruding cam structure (14a) to break the ice (40) between the side parts (16).

Icebreaker (10) for a vessel (12), where the icebreaker (10) is connected to a bow (12a) of a vessel (12) for breaking up solid ice (40) floating on a water surface, the icebreaker (10) comprises a central part (14) sliding on a first side of the ice (40) and two or more side parts (16) sliding on an opposite part of the ice (40). The centre part (14) and the side parts (16) extend in parallel forward and works against each other when breaking the ice (40) to prevent the ice (40) from lifting, wherein a lower edge of the side parts (16), being in contact with the ice (40), is narrow and sharp to initiate breaking lines (50) in the ice (40), and the centre part (14) comprises a forward protruding cam structure (14a) to break the ice (40) between the side parts (16).

Provided is a control system for operating a floating wind turbine under sea ice conditions. The control system includes a detection device configured for detecting a formation of ice in a critical zone around the floating wind turbine, and an ice inhibiting device configured for manipulating the floating wind turbine in such a manner that the critical zone is free of a threshold amount of the detected formation of ice. Furthermore, a floating wind turbine is provided which includes a wind rotor including a wind rotor including a blade, a tower, a floating foundation, and an above-described control system. Additionally, a method for operating a floating wind turbine under sea ice conditions is provided.

The invention relates to a watercraft, in particular a swimming and/or diving aid with a hull (10) having a stern (12) and a bow (11), wherein two flow channels (27) are provided in the hull (10) or on the hull (10), which flow channels extend from a water inlet (22) to a water outlet (24), wherein a water acceleration device (52), in particular a propeller or a propelling screw, is arranged in each of the two flow channels (27), wherein each water acceleration device (52) is driven by a motor (50), wherein handles (31) a user can hold on to are arranged in the midship area between the bow (11) and the stern (12) or in the bow area, wherein a support surface (40) is provided adjoining the handles (31) in the direction of the stern (12), on which support surface the user can at least partially rest, and wherein two spaced-apart bulges extending in the longitudinal direction of the hull (10) are provided on the underside of the hull (10), between which bulges at least one water-sliding surface (14, 15) is arranged. To be able to implement a low flow resistance with a compact structure in such a watercraft, provision is made according to the invention that the flow channels (27) extend at least sectionally in the area of the bulges.

Icebreaker (10) for a vessel (12), where the icebreaker (10) is connected to a bow (12a) of a vessel (12) for breaking up solid ice (40) floating on a water surface, the icebreaker (10) comprises a central part (14) sliding on a first side of the ice (40) and two or more side parts (16) sliding on an opposite part of the ice (40). The centre part (14) and the side parts (16) extend in parallel forward and works against each other when breaking the ice (40) to prevent the ice (40) from lifting, wherein a lower edge of the side parts (16), being in contact with the ice (40), is narrow and sharp to initiate breaking lines (50) in the ice (40), and the centre part (14) comprises a forward protruding cam structure (14a) to break the ice (40) between the side parts (16).

A catamaran oil production apparatus is disclosed for producing oil in a marine environment. The apparatus includes first and second vessels that are spaced apart during use. A first frame spans between the vessels. A second frame spans between the vessels. The frames are spaced apart and connected to the vessels in a configuration that spaces the vessels apart. The first frame connects to the first vessel with a universal joint and to the second vessel with a hinged connection. The second frame connects to the second vessel with a universal joint and to the first vessel with a hinged or pinned connection. At least one of the frames supports an oil production platform. One or more risers or riser pipes extends from the seabed (e.g., at a wellhead) to the production platform (or platforms). In one embodiment, the production apparatus includes crew quarters.

An optical energy transfer and conversion system comprising a fiber spooler and an electrical power extraction subsystem connected to the spooler with an optical waveguide. Optical energy is generated at and transferred from a base station through fiber wrapped around the spooler, and ultimately to the power extraction system at a remote mobility platform for conversion to another form of energy. The fiber spooler may reside on the remote mobility platform which may be a vehicle, or apparatus that is either self-propelled or is carried by a secondary mobility platform either on land, under the sea, in the air or in space.

An optical energy transfer and conversion system comprising a fiber spooler and an electrical power extraction subsystem connected to the spooler with an optical waveguide. Optical energy is generated at and transferred from a base station through fiber wrapped around the spooler, and ultimately to the power extraction system at a remote mobility platform for conversion to another form of energy. The fiber spooler may reside on the remote mobility platform which may be a vehicle, or apparatus that is either self-propelled or is carried by a secondary mobility platform either on land, under the sea, in the air or in space.