The invention relates to an operations vessel for the maintenance, installation and/or disassembly of offshore structures, comprising: a hull equipped with ballast means connected to a control system; at least one working platform supported on the hull by means of one or more support elements; and at least one system for coupling to an offshore structure, wherein said coupling system can adopt, at least, a state in which it is coupled to said offshore structure and a state in which it is not coupled to said offshore structure. Advantageously, the control system and the coupling system are configured in a cooperating manner, in order to adopt at least two working positions of the vessel, wherein the hull adopts an above-water state with the coupling system decoupled, and at least a second working position wherein the hull adopts a submerged state in which the coupling system is coupled to the offshore structure.

A dock stabilizing pile guide device includes a frame attached to a floating dock and enclosing a respective piling. The frame carries a plurality of rollers that rotatably interengage the piling and guide the dock upwardly and downwardly along the piling as the depth of the underlying water changes.

A dock stabilizing pile guide device includes a frame attached to a floating dock and enclosing a respective piling. The frame carries a plurality of rollers that rotatably interengage the piling and guide the dock upwardly and downwardly along the piling as the depth of the underlying water changes.

The invention relates to an apparatus for launch and recovery a submersible vessel from and to an off-shore site. The apparatus comprises an actively operated gimbal coupled between said first end of the launch/recovery cable and the submersible vessel, when the submersible vessel is suspended by the launch/recovery cable. Both the displacement unit and the winch areoperated by electrical motors during displacement of the displacement unit and during winding of the launch/recovery cable. Electrical power for the electrical motors is provided by batteries of the apparatus.

According to an embodiment of the present disclosure, a vessel includes: a hull 100 provided with a propellant 140; a deck 200 spaced apart from the hull 100; and a support 300 between the hull 100 and the deck 200, the support 300 configured to support 300 the deck 200 with respect to the hull 100, wherein the hull 100 is disposed below a water surface during operation, and the deck 200 is supported by the support 300 to be disposed above the water surface during operation.

A hull locating arrangement for a vessel is disclosed that has a body at least partially suspended above at least a first hull by at least one support. The hull locating arrangement includes for the first hull a forward locating linkage and a rearward locating linkage, each of the forward locating linkage and the rearward locating linkage being connected between the first hull and the body to together constrain said hull in the lateral, longitudinal, roll and yaw directions relative to the body. The forward locating linkage includes a forward radius arm and a drop link, the drop link being pivotally connected to the radius arm. The rearward locating linkage includes a rearward radius arm connected between the body and the first hull.

A marine wind power generation floating body according to an embodiment of the present disclosure can be coupled to a tower used for wind power generation and is provided at sea. The marine wind power generation floating body includes a floating main body which is formed at a predetermined length and which has a circular transverse cross section, a ballast part positioned on one side of the floating main body, a damping plate positioned at one end of the floating main body, and formed with a diameter that is larger than the outer diameter of one side of the floating main body, and a pitching/rolling damping part which is positioned on the other side of the floating main body, and which damps the horizontal pitching and rolling of the floating main body.

Various embodiments of a submerged submersible sailing vessel are disclosed. Such a submerged sailing vessel may comprise a submersible hull assembly, a keel coupled to and extending upwards from hull assembly towards a water surface, and a wind-catching assembly coupled to and extending upwards into the air from the keel for propelling the submerged sailing vessel. The hull assembly and the keel are submerged below the water surface as the vessel is propelled by the wind-catching assembly above the water surface.

Various embodiments of a submerged submersible sailing vessel are disclosed. Such a submerged sailing vessel may comprise a submersible hull assembly, a keel coupled to and extending upwards from hull assembly towards a water surface, and a wind-catching assembly coupled to and extending upwards into the air from the keel for propelling the submerged sailing vessel. The hull assembly and the keel are submerged below the water surface as the vessel is propelled by the wind-catching assembly above the water surface.

A control system for stabilizing a floating wind turbine is connected to at least one sensor and at least one actuator of the floating wind turbine and configured for: determining a difference between the floater orientation and a predefined desired floater orientation of the floating wind turbine during towing of the floating wind turbine, actuating the at least one actuator during towing of the floating wind turbine for changing the floater orientation of the wind turbine to minimize the difference.