A floating substructure made of a steel structure with ballast tanks provides buoyancy and stability to support a wind turbine generator in deep waters. Mooring lines directly attach to the substructure to provide stability. These mooring lines can also be directly anchored to the bed of a body of water, such as a seabed, to control movements. Different types of anchors can be used depending on the soil characteristic of the bed of the body of water.

A floating substructure made of a steel structure with ballast tanks provides buoyancy and stability to support a wind turbine generator in deep waters. Mooring lines directly attach to the substructure to provide stability. These mooring lines can also be directly anchored to the bed of a body of water, such as a seabed, to control movements. Different types of anchors can be used depending on the soil characteristic of the bed of the body of water.

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.

A stabilizer (10) includes a base (20) fixed on a motion reduction target (1); a gimbal (40) supported by the base to be rotatable around a first axis (RA); a damper mechanism (30) disposed to damp a relative rotary motion of the gimbal (40) to the base (20); a flywheel (50) disposed to be rotatable around a second axis (RB) orthogonal to the first axis (RA). The damper mechanism (30) is a passive-type damper mechanism. A first value (D1) of a damping coefficient (D) of the damper mechanism (30) when an angular velocity of the gimbal (40) is a first angular velocity is larger than a second value (D2) of the damping coefficient (D) of the damper mechanism (30) when the angular velocity of the gimbal (40) is a second angular velocity smaller than the first angular velocity.

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.

A floatable offshore structure, in particular a floatable offshore wind turbine, includes at least one floatable foundation with at least one floating body. The offshore structure further includes at least one anchoring arrangement configured to fix the offshore structure to an underwater ground in an anchoring state of the offshore structure. The anchoring arrangement includes at least one anchor connection between an anchor and the floatable foundation and at least one position stabilization device configured to change the length of the anchor connection between the anchor and the floatable foundation in the anchoring state based on at least one attitude parameter of the offshore structure and at least one attitude set point parameter.

A method of monitoring accelerations on a vessel includes measuring acceleration on the vessel using one or more sensors. The one or more sensors are communicatively coupled to a computing unit. Real-time acceleration information representative of an acceleration on the vessel based at least in part on the measured acceleration from the one or more sensors is generated. Acceleration prediction information representative of predicted wave slam using the computing unit is generated. Using the acceleration prediction information, automatic control of trim, steering, or throttle controls of the vessel is performed in a fashion computed to reduce the effects of the predicted wave slam.

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.