This invention provides paddle handles comprising one or more improvements. For example, the invention provides paddle handles comprising one or more of an arcuate shape, a plurality of surface channels, a surface channel comprising one or more channel branches, and a recessed outer portion.

A cable fairing (fairing) (40) for reducing the flow resistance for a cable (45) has a wing formed cross section with a wide, rounded front and a tapered tail, a through-going cable channel (46) for the cable (45) perpendicular to the cross section of the widest part of the cross section. The wing profile comprises an elastic material of sufficient stiffness to maintain the shape when it is towed thereby causing flow resistance. The cable fairing (40) has slots (42) cut into the elastic material from the tail towards the cable channel (46), so that the tail comprises slats (41) which can be bent parallel to the cable channel (46) to reduce the cross-section of the cable fairing. By this is low flow resistance, as from a stiff cable jacket, combined with sufficient elastic deformability so the cable (45) with attached cable fairings (40), can be winched and pass through narrow openings in the deployment and retrieval, and wound onto a reel for storage and transport.

A flow modification device connectable to a generally cylindrical element adapted for immersion in a fluid medium is provided. The device comprises an elongate body having a length and a generally circular cross-section; a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions having a height between 2% and 10% of a diameter of the body; and an aperture extending through the length of the elongate body, the aperture being adapted to receive the generally cylindrical element such that the flow modification device is arranged about the cylindrical element. The plurality of raised body portions are helically arranged or twisted about a longitudinal axis of the elongate body and are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the device is connected to the cylindrical element and the connected device and cylindrical element are immersed in the fluid medium and there is relative movement between the connected device and cylindrical element and the fluid medium.

The present invention discloses a novel in-situ rapid steering system for a ship, including a hull and a steering structure. A front flip structure is arranged at a positioned corresponding to a bow. A rear flip structure is arranged at a position corresponding to a stern. A 360-degree adjustable paddle is mounted at a center of a circle directly below the hull. A steering deck is arranged on the hull. The center of the steering deck is provided with a central shaft. The in-situ fast steering system for the ship is simple to be operated and can be steered in-situ in a narrow water area. A size of the hull can be reduced by steering over the bow and stern into the hull. A direction can be adjusted by driving the steering deck to drive the bow and stern, so that the advantage of rapid in-situ steering can be realized.

A flow modification device connectable to a generally cylindrical element adapted for immersion in a fluid medium is provided. The device comprises an elongate body having a length and a generally circular cross-section; a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions having a height between 2% and 10% of a diameter of the body; and an aperture extending through the length of the elongate body, the aperture being adapted to receive the generally cylindrical element such that the flow modification device is arranged about the cylindrical element. The plurality of raised body portions are helically arranged or twisted about a longitudinal axis of the elongate body and are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the device is connected to the cylindrical element and the connected device and cylindrical element are immersed in the fluid medium and there is relative movement between the connected device and cylindrical element and the fluid medium.

A floating structure for supporting a marine wind turbine comprising an emerged tower (21) defined by a tower wall (31), a submerged float (23) defined by a float wall (33) and a float lower end closing wall (34) and a transition element (22) placed in-between and defined by a transition wall (32), wherein the tower wall (31), the float wall (33) and the transition wall (32) have axisymmetric outer surfaces about a central axis (5) respectively defined by a tower generatrix, a float generatrix and a curved concave transition generatrix which is tangent to the tower generatrix, and wherein the axisymmetric outer surface of the float wall (33) has a float upper diameter (D2) equal to the axisymmetric outer surface of the transition wall (32) and bigger than the axisymmetric outer surface of the tower wall (31).

This invention provides paddle handles comprising one or more improvements. For example, the invention provides paddle handles comprising one or more of an arcuate shape, a plurality of surface channels, a surface channel comprising one or more channel branches, and a recessed outer portion.

A structure for reducing the drag of a ship and its application thereof is provided. The structure for reducing the drag of a ship includes at least one turbulence generating structure which is installed on the side surface between the widest section and the aft end or on the bottom surface between the deepest portion and the aft end of the ship. The arrangement of the turbulence generating structure can generate turbulence to reduce the drag of the ship, and thereby increase the speed of the ship and/or reduce the ship's fuel consumption.

A structure for reducing the drag of a ship and its application thereof is provided. The structure for reducing the drag of a ship includes at least one turbulence generating structure which is installed on the side surface between the widest section and the aft end or on the bottom surface between the deepest portion and the aft end of the ship. The arrangement of the turbulence generating structure can generate turbulence to reduce the drag of the ship, and thereby increase the speed of the ship and/or reduce the ship's fuel consumption.

The floating structure (20) for supporting a marine wind turbine comprises a tower (21), a float (23), and a transition element (22) between the tower (21) and the float (23). The tower (21) has a tower tubular wall (31) having a tower axisymmetric outer surface about a central axis (5) defined by a tower generatrix, the float (23) has a float tubular wall (33) and a float lower end closing wall (34), the float tubular wall (33) has a float axisymmetric outer surface about the central axis (5) defined by a float generatrix, and the transition tubular wall (32) has a transition axisymmetric outer surface about the central axis (5) defined by a curved concave transition generatrix which is tangent to the tower generatrix. The transition axisymmetric outer surface of the transition element (22) has a transition upper diameter equal than a tower lower diameter (D1) and a transition lower diameter equal than a float upper diameter (D2). At least the float tubular wall (33), the float lower end closing wall (34) and the transition tubular wall (32) are made of reinforced concrete forming together a reinforced concrete monolithic body.