A vessel and a method for installation of a pile adapted to support an offshore wind turbine are described. The method includes a) suspending the pile from a hoisting cable in a substantially vertical orientation; b) providing a lower end of the pile in a pile holding system limiting horizontal motion of a pile portion held by the pile holding system; and c) lowering the pile with the pile being held by the pile holding system. The lowering includes at least lowering the pile through a splash zone of a body of water, and during step c), two tugger lines are directly or indirectly connected to the pile at a location between the pile holding system and the hoisting cable, said tugger lines being operated to damp motion of the pile in two respective horizontal directions.

An exemplary autonomous seabased resupply system includes an unmanned blob positioned in a water body, the blob containing fuel, a pump on the blob configured to pump the fuel through a conduit to a craft, and a ballast system operable to change a vertical position of the blob in the water body.

A pile holding system is to be mounted on a deck of a vessel, e.g. for installation of a pile adapted to support an offshore wind turbine. The pile holding system is configured to support the pile in an upright position at a pile installation location next to the vessel. A vessel is provided with such a pile holder system. A method for installation of a pile and a pile holder are also disclosed.

The invention relates to a system (1) for use with a crane (4) on a surface vessel (3), comprising a crane tool (15) attached or attachable to a hoisting cable (5) of the crane (4) and one or more adaptors (16) attached or attachable to one or more tools (11-14, 25) for carrying out operations or to one or more components (2, 10), the crane tool (15) comprising a connector (17) and at least one of the adaptors (16) comprising a connector-counterpart (18).

A jack-up platform is described having a horizontal working deck that may be jacked up out of the water by moving its legs to a position wherein they take support on an underwater bottom. The jack-up platform further includes a higher level deck and a lower level deck that define a receiving space for a barge, optionally suitable for carrying parts for construction of a wind turbine, and further a deballasting system configured to bring the floating hull between a receiving position at which the hull is ballasted to a receiving draft in which the lower level deck is submerged underwater and the barge may be received in the receiving space through an opening in the hull, and an operational smaller draft where substantially no water can flow on either of the lower and higher level decks. The receiving space has a centralizing system configured to substantially centralize the received floating barge in the receiving space. A method for facilitating the offshore installation of a wind turbine using the jack-up platform is also described.

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 securing the vessel with respect to the hull of the offshore jack-up when the hull is positioned out of the water and the legs engage the seafloor. A lifting mechanism mounted on the offshore jack-up engages with a cargo carrying platform positioned on the vessel. The platform is lifted with the lifting mechanism between a first position on the vessel and a second position clear of the vessel.

A monopile fastening system (1, 9, 17) for retaining one or more elongated monopile during sea transport and/or quay transport, the system comprising: —at least two supporting devices (3, 11, 18); —a supporting frame (2, 10, 23) for securing the at least two supporting devices to a surface of a vessel, barge or a sea transport unit, the at least two supporting devices having each at least one surface (6, 32) in contact with a surface (7, 33) of the supporting frame; wherein each of the at least two supporting devices comprises, at least two supporting elements (4, 5, 12, 13, 20, 24, 27), the supporting elements having each at least one surface (14, 15, 25, 26, 28, 29) in contact with each other; wherein the at least two supporting elements are connected with each other through one or more displacing means (16, 22, 30); and wherein the one or more displacing means are means for displacing the at least two supporting elements along the at least one surface in contact with each other.

In a method for assembling a wind power generator, a tower of a floating-type offshore wind power generation device is placed and fixed to a tower standing frame, blades of the floating-type offshore wind power generation device are fixed and stacked on a first mount and a second mount, a carriage is used 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, the blade carrier is vertically moved below the blades, the blade carrier is vertically moved to correspond to the height of the blade assembly table in a state in which the blade is gripped by the blade installer, the blade installer is moved from the second side to the first side, and the blade is assembled to a nacelle formed at one end of the tower.

Described is a lifting system for taking up an elongate object from a deck of a vessel. The lifting system has a crane arm which is connected to the deck and from which is suspended a take-up frame to which the elongate object can be attached. Also present is a winch setup and control lines connected thereto and configured to control the movement of the elongate object when this object is lifted off the deck. The control lines run from the take-up frame to the winch setup. The winch setup forms part of a support structure which extends from the deck to a height and is intended to be able to absorb the forces acting on the object while it is being lifted off the deck. Also described is a method for taking up an elongate object from a deck of a vessel.

A crane (16) for upending an elongate structure such as a monopile (28) supports elongate rigging elements that are connected to the structure at respective connection axes spaced longitudinally along the structure. At least one of those elements, of fixed length (36), extends to a first connection axis and at least one other of those elements, of variable length (34), extends to a second connection axis. A frame (24) suspended from the crane (16) supports a winch (46) that pays out the variable-length element (34) of the rigging to lengthen that element. This lowers the second connection axis relative to the first connection axis, which serves as a pivot axis about which the structure is upended.