The present invention relates to a preassembly system comprising a support arrangement and a plurality of tower structures each having a mean diameter, D, wherein said plurality of tower structures are placed vertically on the support arrangement during preassembly and/or storage, the support arrangement comprising a set of attachments means for each tower structure, said attachment means being configured for positioning said plurality of tower structures with a mutual distance, a, wherein the ratio a/D is below 2.3, such as below 2.2, such as below 2.1, such as below 2.0 in order to reduce loads on the plurality of tower structures due to Vortex shedding while being secured to the preassembly system. The present invention further relates an associated method and a sea going vessel for transporting a plurality of vertically oriented tower structures.

A method for assembling a wind power generator includes placing and fixing a tower of a floating-type offshore wind power generation device to a tower standing frame, fixing and stacking blades of the floating-type offshore wind power generation device on a first mount and a second mount, using a carriage to move a blade installing structure including a blade assembly table formed on a first side and a blade carrier formed on a second side opposite to the first side, vertically moving the blade carrier below the blades, vertically moving the blade carrier to correspond to the height of the blade assembly table in a state in which the blade is gripped by the blade installer, moving the blade installer from the second side to the first side, and assembling the blade to a nacelle formed at one end of the tower.

A method of offshore mounting a wind turbine, the wind turbine including a foundation, a tower, a nacelle and a plurality of blade is provided. The method includes the steps of: a) mounting the foundation on a sea ground; b) mounting the tower to the foundation; c) mounting the nacelle to the tower; and d) mounting the plurality of blades to the nacelle. At least one of the steps a) through c) is performed by use of at least one floating vessel which is exclusively supported by buoyancy when performing the at least one of the steps a) through c).

A method for culturing a bovine progenitor cell, comprising the step of: culturing a bovine progenitor cell in a serum-free medium for culturing a bovine progenitor cell, wherein said serum-free medium comprises an albumin; and a fibroblast growth factor (FGF).

A method of transporting a first vessel having wind turbine components to an offshore installation vessel. The method includes (i) securing the first vessel to a second vessel using a first tow line attached to a front end (or bow) of the first vessel, and (ii) securing the first vessel to a third vessel using a second tow line attached to a back end (or stern) of the first vessel. The method further includes transporting the first vessel to the offshore installation vessel using the second vessel and the third vessel secured to the first vessel via the first and second tow lines, respectively. The method also includes securing the first vessel to the offshore installation vessel. The first vessel can include one or more fender walls. The first vessel can be secured to the offshore installation vessel using one or more mooring lines.

A system for levelling and gripping a jacket leg into a hollow foundation pile has a levelling assembly for adjusting the longitudinal axis of a jacket leg partially inserted in a hollow foundation pile with an actuation group arranged about the jacket leg and configured to exert a force parallel to the longitudinal axis between the upper edge of the hollow foundation pile and the jacket leg and selectively attachable to the jacket leg and recoverable for further use in another levelling assembly; and a gripping assembly for locking the jacket leg in a designated position with respect to the hollow foundation pile once leveled.

Provided is a control system for stabilizing a floating wind turbine, the comprising a detection device for monitoring an offset from a predetermined floater pitch angle and/or an offset from a predetermined floater yaw angle, wherein the detection device is further configured for monitoring an oscillating motion of the floater pitch angle and/or the floater yaw angle, wherein the predetermined floater pitch angle and floater yaw angle define a predetermined balanced state of the floating wind turbine, wherein a threshold of the oscillating motion of the floater pitch angle and the oscillating motion of the floater yaw angle further define the predetermined balanced state of the floating wind turbine, and an actuation device configured for manipulating the oscillating motion of the floater pitch angle and/or the oscillating motion of the floater yaw angle until the predetermined balanced state of the floating wind turbine is met.

The invention concerns a method for installing a tubular metal pile (28) in a rocky ground, successively comprising drilling the rocky ground (6) in order to form a cavity (14) of predetermined diameter and depth, filling the cavity with a granular material (18), arranging the granular material present in the cavity by vibration, and installing the pile in the cavity.

A floating metal platform for supporting an offshore installation includes three elongated elements. Each elongated element includes a first elongated member; a second elongated member parallel to the first elongated member; and at least a first buoyancy element connected to the first elongated member and the second elongated member. Each elongated element has a first end and an opposite second end. One of the first end or the second end of each of the elongated elements is connected to one of the first end or the second end of at least one of the other elongated elements. A floating wind turbine includes the floating metal platform; a tower connected to the platform; and a horizontal axis wind turbine connected to the tower.

The offshore jack-up has a hull and a plurality of moveable legs engageable with the seafloor. The offshore jack-up is arranged to move the legs with respect to the hull to position the hull out of the water. The method comprises moving at least a portion of a vessel underneath the hull of the offshore jack-up or within a cut-out of the hull when the hull is positioned out of the water and the legs engage the seafloor. A stabilizing mechanism mounted on the jack-up is engaged against the vessel. The stabilizing mechanism is pushed down on the vessel to increase the buoyant force acting on the vessel.