The disclosure provides a method and system to monitor and advise the status of a group of floating platforms, such as offshore floating wind platforms, by using a floating platform's motion in the group and detect one or more anomalies to identify one or more disorders (including irregularities) in the group. Input for this method can include information of wind speed and direction and orientations of the wind turbine nacelles. The orientation of the platform can complement the orientation of a wind turbine nacelle on the platform in case the platform is equipped with a turret. Disorders include, but not limited to, mooring line failure, shifts of a drag anchor, other issues with the mooring system components such as fairleads, issues with the ballasting configuration of the floater, issues with the turret (if any), issues with the swivel of the nacelle, issues with the rotor, and issues with the blades.

Disclosed herein is a turret mooring system for a tidal turbine assembly 150, which increases the ratio of the torque exerted by the turret 100 relative to frictional forces between the turret 100 and the assembly 150 moored to the turret 100. In some examples, the frictional forces are reduced by the turret providing an upward force to the assembly, which also resists pitching moments. In other examples, the torque exerted by the turret 100 is increased by the use of a bifurcated mooring line 106, 108 which couples to two spaced apart attachment points 128 on a chain table 104 of the turret 100 and to a single point 114 on the water bed.

Surge damping systems and processes for using same. In some embodiments, a system for mooring a vessel can include a mooring support structure that can include a base structure and a turntable disposed on the base structure. A vessel support structure can be disposed on the vessel. At least one extension arm can be suspended from the vessel support structure. A ballast tank can be connected to the extension arm. A uni-directional passive surge damping system can be disposed on the vessel and can include an elongated tension member connected to the ballast tank that can be configured to dampen a movement of the ballast tank by applying a tension thereto. A yoke can extend from and can be connected at a first end to the ballast tank and can include a yoke head disposed on a second end thereof that can be configured to connect to the turntable.

The invention relates to a connector, such as a subsea connector (100), for connecting a line or lines such as mooring lines (140), to a subsea structure (145), such as a submerged turret loading or a submerged turret production buoy. The invention also relates to associated apparatus, structures and methods. The subsea connector (100) comprises a first portion (105) and a second portion (110) and means (115) for connecting the first (105) and second portions (110). The means (115) for connecting comprise at least part of a through-passage (120) in the second portion (110). The first portion may comprise means (125) for connection to one or more lines (140), such as mooring lines, allowing rotational movement around or about a transverse axis of the first portion (105) with respect to the line (140). The second portion (110) may comprise means (130) for connection to a subsea structure (145) allowing rotational movement around or about a transverse axis of the second portion (110) with respect to the subsea structure (145). In some examples, the transverse axis of the first portion (105) may be substantially perpendicular to the transverse axis of the second portion (110).

The disclosure provides a method and system to monitor and advise the status of a group of floating platforms, such as offshore floating wind platforms, by using a floating platform's motion in the group and detect one or more anomalies to identify one or more disorders (including irregularities) in the group. Input for this method can include information of wind speed and direction and orientations of the wind turbine nacelles. The orientation of the platform can complement the orientation of a wind turbine nacelle on the platform in case the platform is equipped with a turret. Disorders include, but not limited to, mooring line failure, shifts of a drag anchor, other issues with the mooring system components such as fairleads, issues with the ballasting configuration of the floater, issues with the turret (if any), issues with the swivel of the nacelle, issues with the rotor, and issues with the blades.

A moored floating offshore wind semi-submersible platform with at least three columns characterized in that columns are supported on a T-shaped underwater hull made up of two elongated pontoons, where one pontoon is perpendicular to the other pontoon and a method that allow that the semi-submersible platform is constructed in hull-assemblies and blocks at a first location, transported efficiently to a second location close to the final offshore location where the hull-assemblies and blocks may be assembled quay-side while floating in the water. The platform will support at least one wind turbine on a supporting structure (tower) but may also support two turbines and in the latter case the platform will be moored offshore with a mooring turret to allow the platform to align in a favourable direction to the wind.

A coupler configured to provide an articulated connection about two axes of rotation between a first member and a second member. The coupler can include a first end that defines a first bore therethrough and a second bore at least partially therethrough and a second end that defines a third bore therethrough. The first bore and the second bore can partially intersect one another.

The invention provides a floating windmill, comprising a floating element and a wind turbine. The floating windmill is distinguished in that it further comprises: a tension leg, an anchoring, a buoyancy element, a swivel and a cross bar, wherein the swivel is arranged in the buoyancy element. In operation, the floating windmill in operation is configured with the wind turbine in an upper end of the floating element extending up above the sea level, with a lower end or part of the floating element submerged in the sea, with the cross bar in one end connected to the lower part or end of the floating element and in the opposite end connected to the buoyancy element, with the buoyancy element fully submerged, preferably at safe draught depth below surface for service vessels and/or marine transport ships, with the tension leg arranged between the buoyancy element and the anchoring on the seabed. The floating windmill configured with the wind turbine in the upper end can weathervane freely around the buoyancy element, wherein in a low force condition when the forces by ocean current, wind and waves are low the floating element, the buoyancy element and the tension leg is oriented in substance in vertical direction and the cross bar is oriented in substance in horizontal direction, wherein in a high force condition when the forces by ocean current, wind and waves are high the shape of the floating element, cross bar, buoyancy element and tension leg is stretched by the forces to provide a shape like a lazy-s configuration, which change in shape and dynamic behavior reduce extreme stress levels.

A multidirectional turret loading system for loading/unloading of fluid between an offshore installation and a vessel is provided, comprising a winch for pulling a messenger line, a messenger line guide roller system, and a turret positioned on the bow, on the sides or aft on the vessel with a mainly vertical rotational axis. The turret comprises a turret frame with a hose access opening and a messenger line access opening. The turret further comprises a bearing arrangement for rotation of the turret, a coupling manifold mounted near the hose access opening, a crude line turret swivel mounted in the center of the turret connecting the coupling manifold to a crude line of the vessel and at least one motor for rotating the turret.

Mooring support structures, systems for mooring vessels, and processes for using same. In some embodiments, a system for mooring a vessel can include a mooring support structure than can include a post connected at a first end to a turntable disposed on a base structure. The post can extend out from the turntable and a yoke head connector can be connected to a second end of the post. A distal end of the yoke head connector can provide a disconnection location such that when a yoke head is disconnected from the yoke head connector, the yoke head can fall by gravity from the yoke head connector without contacting the mooring support structure.