A gangway includes a distal end on which an end effector unit is attached. The end effector unit has an outer surface at least a certain portion of which is adapted to be in contact with an installation, wherein a movement of a rotatable element in the end effector unit corresponds to a movement of the distal end with respect to a reference point on the installation when the end effector unit is in contact with the installation, the movement of the distal end being at least along one of the axes related to the installation. A method for repositioning a gangway to a desired position on an installation or a target structure. A vessel or a watercraft includes the gangway and an installation includes the gangway. A computer software product implements method steps herein disclosed.

The present invention belongs to the field of ship engineering, and provides a ship real wind measuring device calibration method. In this method a ship sway simulator is build using a 2-axis ganged platform, natural wind is simulating generated using a wind tunnel flow field. Then the ship sway simulator is controlled to simulate the ship spatial motion under the disturbance of stormy waves. Furthermore, the data of the wind speed and direction is obtained under different sway angles and speeds. So that the database of wind direction and speed measurement, attitude measurement, actual wind direction and speed measurement is formed. Subsequently, a calibration model based on BP neural network is constructed using this database, a ship real wind direction and speed calibration algorithm is formed, which can calibrate a ship real wind measuring device.

An offshore transfer system for transferring persons and/or cargo between a transfer vessel and an offshore object, includes the transfer vessel having a docking position with a mooring element. The offshore object includes a docking arm, in particular a gangway, that at a free end is provided with a coupling device. The docking position on the transfer vessel has its mooring element at least partly compensated for transfer vessel motions, at least during a docking operation, and includes one or more force actuators for moving the mooring element relative to the transfer vessel, one or more sensors for detecting motions of the transfer vessel, and a control unit for driving the one or more force actuators such that the motions of the transfer vessel get at least partly compensated for the mooring element.

Systems, assemblies, and methods for conveniently operating marine devices associated with a watercraft are provided herein. An example system includes a controller, a sensor module, and a marine device. The controller is configured to receive a user input indicating a desired action via the sensor module and transmit a signal to the marine device to cause the marine device to operate in a particular manner. The sensor module may include one or more motion sensors, and the controller may be configured to filter unintentional movement from the raw motion data sensed by the sensor module, such as due to movement of the watercraft floating on the surface of the water. Thus, the system may enable convenient and intuitive control over various marine devices associated with the watercraft.

Described is a device for providing a sizeable, slender object having a longitudinal direction into an underwater bottom from a deck of a vessel. The device includes a lifting means configured to take up the object at a lifting point thereof and position it on the underwater bottom; an upending tool connected to an edge of the vessel and configured to engage a first circumferential part of the object suspended from the lifting means and provide a pivot around which the object can be upended; and a gripping tool connected to an edge of the vessel and configured to engage a second circumferential part of the object suspended from the lifting means, whereby the first and second circumferential parts are optionally spaced apart in the longitudinal direction of the object. The gripping tool includes an actuator system configured to act on at least one of the upending tool and the gripping tool and control movements of at least one of the first and the second circumferential parts, relative to the vessel. A method using the device is also described.

A deepwater hoisting system includes a synthetic fibre rope winch assembly including a motor driven first winch and a length of synthetic fibre rope driven by said first winch. The synthetic fibre rope has an end remote from the first winch. The system further includes a steel wire winch assembly including a motor driven second winch and a length of steel wire driven by said second winch. The steel wire has an end remote from the second winch. At least the second winch is an active heave compensation motor driven winch. The system further includes a lifting block having a lifting block sheave, through which the synthetic fibre rope is run. The end of the synthetic fibre rope is connected to the end of the steel wire, so that the lifting block is suspended in a double-fall arrangement.

A system to transfer people and/or cargo during offshore operations includes a base with a stationary part and a moveable part that is rotatable relative to the stationary part about a substantially vertical first axis; a support arm having a first free end and a second free end opposite the first free end of the support arm; a boom having a first free end and a second free end opposite the first free end of the boom; a load support element; a measurement system; an actuator system; and a control system. The support arm at a location in between the first and second free end of the support arm is mounted to the moveable part of the base such that the support arm is rotatable relative to the moveable part about a substantially horizontal second axis.

The invention is directed towards a passive heave compensation arrangement for compensating for heave events in the open water, when loading or offloading/launching objects. The arrangement is part of a system that includes a water vessel that is operating on open water, a davit, and an object to be loaded/offloaded. The davit includes a stanchion, a boom, and a capture head for capturing objects within the head. The arrangement includes first and second winches, as well as a gas spring that applies forces to the boom in response to heave events, the gas spring as a part of the arrangement, passively compensating for every heave event.

Present teachings relate to a gangway comprising a distal end on which an end effector unit is attached. The end effector unit has an outer surface at least a certain portion of which is adapted to be in contact with an installation, wherein a movement of a rotatable element in the end effector unit corresponds to a movement of the distal end with respect to a reference point on the installation when the end effector unit is in contact with the installation, the movement of the distal end being at least along one of the axes related to the installation. The present teachings also relate to a method for repositioning a gangway to a desired position on an installation or a target structure. The present teachings also relate to: a vessel or a watercraft comprising the gangway; and an installation comprising the gangway. The present teachings further relate to a computer software product implementing any of the method steps herein disclosed.

The generation of electricity is described, using an offshore wind turbine. A generating sub-assembly 101 is supported by support mechanism (103) upon a support structure 102. The generating sub-assembly has a wind-responsive turbine and an electrical generator. The support structure includes a buoyancy portion (106) for submersion in water and a mast portion (108) extending from said buoyancy portion to extend the generating sub-assembly above the waterline. The support structure is buoyant and is free to roll when floating in water and the support mechanism is hinged to allow the generating sub-assembly to maintain an operational angle during the rolling of the support structure.