A buoyant offshore platform for supporting a renewable energy system having a base portion for submerging below the surface of a body of water, a top portion, at least one mooring line for fixing the platform to a bed of the body of water, and a tensioning means for applying tension to at least one of the mooring lines. The platform further comprises a floating configuration in which the platform is positioned floating on the surface of the body of water. The platform has a deployed configuration in which the base portion is submerged and the top portion remains above the surface of the body of water. In use, the tensioning means is arranged to apply tension to the at least one mooring line fixed between the platform and the bed such that the buoyant offshore platform transitions between the floating configuration and the deployed configuration.

A mooring system for mooring a floating platform having a plurality of stabilizing arms with floats, the mooring system including an anchoring system containing a plurality of anchors and anchoring cables for anchoring the mooring system in deep sea. The center part of the mooring system includes a mooring unit containing a plurality of mooring elements and positioning wires, where each mooring element is connected to an adjacent mooring element with a positioning wire and to an anchor.

A mooring system for mooring a floating platform having a plurality of stabilizing arms with floats, the mooring system including an anchoring system containing a plurality of anchors and anchoring cables for anchoring the mooring system in deep sea. The center part of the mooring system includes a mooring unit containing a plurality of mooring elements and positioning wires, where each mooring element is connected to an adjacent mooring element with a positioning wire and to an anchor.

A hydrokinetic turbine system for harvesting energy from riverine and tidal sources, including a first floating dock, a marine hydrokinetic turbine mounted on the first floating dock, and a second floating dock. The system further includes a winch assembly mounted on the second floating dock and operationally connected to the first floating dock and a linkage assembly operationally connected to the first floating dock and to the second floating dock. The linkage assembly may be actuated to pull the first floating dock into contact with the second floating dock. The linkage assembly may be actuated to distance the first floating dock from the second floating dock, and the winch assembly may be energized to orient the first floating dock into a position wherein the marine hydrokinetic turbine is above the first floating dock and wherein the winch assembly may be energized to orient the first floating dock into a position wherein the marine hydrokinetic turbine is below the first floating dock.

An assembly includes an object with a vertical height of at least 30 metres placed on a bearing frame and a motion compensation platform including a base attached to a vessel. The platform includes an x-y actuator system for rotating the bearing frame with respect to the base about an x-axis and a y-axis, a sensor system configured to detect an x-axis rotating movement, and a y-axis rotating movement, and to generate a corresponding sensor signal, as well as an x-y control system configured to adjust the position of the bearing frame with respect to the base, depending on the sensor signal. The bearing frame is supported at a vertical distance above the base by means of a three-point support having a hinged, fixed first support and hinged second and third supports which are telescopic in the longitudinal direction of the z-axis.

An assembly includes an object with a vertical height of at least 30 metres placed on a bearing frame and a motion compensation platform including a base attached to a vessel. The platform includes an x-y actuator system for rotating the bearing frame with respect to the base about an x-axis and a y-axis, a sensor system configured to detect an x-axis rotating movement, and a y-axis rotating movement, and to generate a corresponding sensor signal, as well as an x-y control system configured to adjust the position of the bearing frame with respect to the base, depending on the sensor signal. The bearing frame is supported at a vertical distance above the base by means of a three-point support having a hinged, fixed first support and hinged second and third supports which are telescopic in the longitudinal direction of the z-axis.

The pile plug (1) has independent buoyancy, high displacement and a rigid structure of the skeleton (2) and a flexible sheath (3) at least on the side surface of the plug body, while the flexible sheath constitutes an airtight container equipped with pneumatic valves (4). The sheathing material (3) of the plug (1) can be made of a material with a high friction coefficient in relation to the pile material selected from the group: natural rubber, synthetic rubber, polyurethane. Inside the cap (1) there is a pile venting pipe (14) closed with a pile venting valve (15), which connects the space inside the pile with the surroundings. Preferably, the cap (1) has a ballast load (16) internally for positioning the plug with respect to the pile and for balancing the cap horizontally and also preventing unfavourable rotation of the pile.

The pile plug (1) has independent buoyancy, high displacement and a rigid structure of the skeleton (2) and a flexible sheath (3) at least on the side surface of the plug body, while the flexible sheath constitutes an airtight container equipped with pneumatic valves (4). The sheathing material (3) of the plug (1) can be made of a material with a high friction coefficient in relation to the pile material selected from the group: natural rubber, synthetic rubber, polyurethane. Inside the cap (1) there is a pile venting pipe (14) closed with a pile venting valve (15), which connects the space inside the pile with the surroundings. Preferably, the cap (1) has a ballast load (16) internally for positioning the plug with respect to the pile and for balancing the cap horizontally and also preventing unfavourable rotation of the pile.

Delivery of a high volume of floating systems for wind turbines can make floating wind economic. The delivery can involve the standard design of sections, such as tubes or cans, comprising a rolled plate and ring stiffeners. The delivery can then involve the transportation of the sections in block to an assembly site that is closer to the planned installation point. The sections are used to manufacture floating vessels, such as semi-submersibles, buoyant towers, and/or spars, at the assembly site, which can include a barge with cranes. For semi-submersibles, the delivery can then involve the installation of the Tower, the nacelle, and blades using the barge cranes. Alternatively, for spars or buoyant towers, the nacelle and blades can be installed at an off-shore location using a platform, such as a standard jack-up vessel or a crane jacket.

A method of controlling a position and/or an orientation of an elongated structure is provided. The method is a method of controlling a position and/or an orientation of an elongated structure connected via a gripper to a vessel. The method comprises the steps of: receiving force data indicative of an interaction force between the structure and the gripper; and controlling a position and/or an orientation of the structure and the vessel, in particular controlling a position and/or orientation of the structure and/or the vessel with respect to each other. The step of controlling a position and/or an orientation of the structure and the vessel comprises controlling the position and/or the orientation of the structure and the vessel on the basis of the force data.