The present invention relates to a method for installing a wind turbine or other tall structure at a target location at sea, the method comprising: providing an installation vessel comprising at least one crane, wherein the crane comprises a lower boom part, a right boom part, and a left boom part, wherein the right boom part and the left boom part are connected to an upper portion of the lower boom part and extend from said upper portion, wherein a space is present between the right and left boom part, lifting a tall structure part, in particular the nacelle assembly, with the crane, wherein in top view the tall structure part is supported at least partially between the right and left boom part by one or more hoist lines extending from the right and left boom part to the tall structure part.

A system for release of mooring loading and unloading lines between a loading and unloading station at sea and a vessel comprises a yoke with mooring tethers, for connection between the yoke and the vessel. A method for quick release comprises disconnecting the lines, connecting them to a winch arrangement; lowering line connectors for parking on a parking structure on the yoke if the swivel is above sea level, or on the sea floor if the swivel is close to the sea floor; lowering the yoke by the winch arrangement after the line connectors are parked on the parking structure if the swivel is above sea level, lowering the yoke with the line connectors if the swivel is close to the sea floor; stopping the winch arrangement when the yoke has landed on the sea floor, and further lowering the mooring tethers on the sea floor by moving the vessel.

A system for release of mooring loading and unloading lines between a loading and unloading station at sea and a vessel comprises a yoke with mooring tethers, for connection between the yoke and the vessel. A method for quick release comprises disconnecting the lines, connecting them to a winch arrangement; lowering line connectors for parking on a parking structure on the yoke if the swivel is above sea level, or on the sea floor if the swivel is close to the sea floor; lowering the yoke by the winch arrangement after the line connectors are parked on the parking structure if the swivel is above sea level, lowering the yoke with the line connectors if the swivel is close to the sea floor; stopping the winch arrangement when the yoke has landed on the sea floor, and further lowering the mooring tethers on the sea floor by moving the vessel.

A pin point corer for collecting samples from a seabed of a sea, having a control unit to be positioned on a vessel or similar remote position, a top lift unit, which can be attached to a lifting and lowering unit of a vessel via an cable, such that it can be lifted and lowered relative to the seabed, a corer unit, releasable attached to the top lift unit by a fixation unit and arranged for being at least partly driven into layers of the seabed to collect the samples from there, e.g. when released from the top lift unit, wherein the top lift unit comprises a positioning unit bi-directionally communicating with the control unit for controlling the position of the corer unit. The invention also relates to a respective system and a method for collecting samples by use of such a pin point corer.

The present invention relates to a marine structure comprising a launch and recovery system for a submersible vehicle, and methods of operating the marine structure. The system comprises: a docking receiver, a towing head comprising a locking mechanism and being connectable to the docking receiver (13), a towing arrangement adapted to mechanically connect the towing head to the marine structure and being adapted to control the distance between the towing head and the docking receiver, and a lifting device connected to the docking receiver and being adapted to move the docking receiver relative to the marine structure. The lifting device can arrange the docking receiver in a towing head receiving and/or releasing position in which the docking receiver: (i) is completely submerged into the body of water, and (ii) is prevented from moving relative to the marine structure.

The present invention relates to a marine structure comprising a launch and recovery system for a submersible vehicle, and methods of operating the marine structure. The system comprises: a docking receiver, a towing head comprising a locking mechanism and being connectable to the docking receiver (13), a towing arrangement adapted to mechanically connect the towing head to the marine structure and being adapted to control the distance between the towing head and the docking receiver, and a lifting device connected to the docking receiver and being adapted to move the docking receiver relative to the marine structure. The lifting device can arrange the docking receiver in a towing head receiving and/or releasing position in which the docking receiver: (i) is completely submerged into the body of water, and (ii) is prevented from moving relative to the marine structure.

A method of providing motion compensation of a subsea package with a synthetic rope comprising attaching the synthetic rope to the subsea package, supporting a first gripper with a wire rope from a winch capable of motion compensation control characteristics and gripping the synthetic rope with the first gripper, supporting a second gripper with a second wire rope, and repeating the following sequence: lowering the first gripper, the synthetic rope, and the subsea package a first distance, gripping the synthetic rope with the second gripper, releasing the first gripper from the synthetic rope, raising the first gripper the first distance, gripping the synthetic rope with the first gripper, releasing the second gripper from the synthetic rope, such that when the subsea package is lowered proximate the subsea landing location the winch capable of operating with motion compensation characteristics can operate to compensate for the vessel motion and smoothly lower the subsea package to the subsea landing location.

A lifting device (14) is disclosed comprising a lift arm (16) and a first support structure (31) which is adapted to be placed on a lifting vessel (61). The lifting device (14) comprises a first attachment unit (33) that comprises a first attachment element (121) which connects the lift arm (16) rotatably to the first support structure (31). The lift arm comprises a load transfer device (19) that is secured to a first end portion (17, 27) of the lift arm (16). The lifting device (14) further comprises a second support structure (44) and a second attachment unit (46) including a second attachment element (123) which connects the lift arm (16) rotatably to the second support structure (44). The first attachment element (121), the second attachment element (123) and the load transfer device (19) all lie substantially in a straight line (L) or substantially in the same plane. There is also defined a lifting vessel carrying said lifting device, as well as the use of the lifting device and of the lifting vessel.

A coupling system for fluid transfer between a bow area of an elongated vessel and a hydrocarbon delivery installation at open sea. The system includes a support frame for suspending the system to the vessel and a fluid receiving tube segment fixed to the support frame comprising a coupling device arranged at a first end of the tube segment and that establishes a leakage free coupling with a hose valve. The system further includes a remotely controlled drive system that simultaneously exerts a transverse force generating pendulum movements of the coupling device in the transverse plane, a longitudinal force generating pendulum movements of the coupling device in a longitudinal plane, and a rotational force generating rotational movement of at least part of the coupling device iteratively adjusting the rotational position of the at least part of the coupling device by regulating the rotational force.

A coupling system for fluid transfer between a bow area of an elongated vessel and a hydrocarbon delivery installation at open sea. The system includes a support frame for suspending the system to the vessel and a fluid receiving tube segment fixed to the support frame comprising a coupling device arranged at a first end of the tube segment and that establishes a leakage free coupling with a hose valve. The system further includes a remotely controlled drive system that simultaneously exerts a transverse force generating pendulum movements of the coupling device in the transverse plane, a longitudinal force generating pendulum movements of the coupling device in a longitudinal plane, and a rotational force generating rotational movement of at least part of the coupling device iteratively adjusting the rotational position of the at least part of the coupling device by regulating the rotational force.