An isolation method, and apparatus, for isolating and temporarily sealing closed an opening of a marine vessel to prevent ingress of fluid into or through the opening, sealing an internal side of the opening from an external side of the opening. A positioning line is provided between a connection point and the sealing apparatus, with the positioning line being tensioned to pull the sealing apparatus towards the opening. The method is performed entirely diverlessly, with no personnel required in or under the water at any stage of the method, including during connecting the positioning line to the connection point and pulling the sealing apparatus onto and/or into the opening.

An isolation method, and apparatus, for isolating and temporarily sealing closed an opening of a marine vessel to prevent ingress of fluid into or through the opening, sealing an internal side of the opening from an external side of the opening. A positioning line is provided between a connection point and the sealing apparatus, with the positioning line being tensioned to pull the sealing apparatus towards the opening. The method is performed entirely diverlessly, with no personnel required in or under the water at any stage of the method, including during connecting the positioning line to the connection point and pulling the sealing apparatus onto and/or into the opening.

The present invention relates to an apparatus for providing access to equipment or structures that require maintenance. More particularly, the present invention is suitable to provide access to equipment or structures located offshore, such as wind turbines or structures for oil and gas production. The apparatus comprises a deck, an apparatus structure for supporting the deck, a platform and a platform support mechanism. The platform is movable with respect to the deck from a stowed position to an extended position. In the extended position the platform forms an extension to the deck. The platform support mechanism comprises at least one cable and at least one compression post. The/each cable has a cable first end attached to the platform at or adjacent to a platform leading edge and a cable second end attached to the platform at or adjacent to a platform trailing edge. The/each compression post supports the cable between the cable first end and the cable second end and is adapted to maintain a substantially constant tension in one of said cables as the platform moves from the stowed position to the extended position.

The present invention concerns a bulbous bow for a sea-going vessel, said bow comprising a load-carrying inner structure mounted at the stem of the vessel and an outer shell structure defining the hydrodynamic properties of the bulbous bow, wherein said outer shell structure is provided with a sub-structure for replaceably mounting on the inner structure. The invention further concerns a seagoing vessel comprising such bulbous bow as well as a method of producing a bulbous bow and a method of mounting or replacing a bulbous bow.

A buoy includes a turret coupled to a buoyant body using a bearing assembly; a deckhouse disposed on the buoyant body; and a bearing retainer configured to retain the bearing assembly and to releasably attach to the turret. The buoy may also include a locking mechanism having an inner opening in the turret, an outer opening in the buoyant body, and a locking member configured for insertion through the inner and outer openings. In one embodiment, the inner opening is out of alignment with the outer opening during operation of the buoy. The buoy may further include a detachable cover on the deckhouse, wherein the cover is configured to attach to the bearing retainer.

A method for repairing a crack in ships or other structures that includes adhesively applying fiber reinforced metal matrix composite tape across the crack of the structure to reduce propagation of the crack and provide additional structural stability until the crack can be permanently repaired.

A method for repairing a crack in ships or other structures that includes adhesively applying fiber reinforced metal matrix composite tape across the crack of the structure to reduce propagation of the crack and provide additional structural stability until the crack can be permanently repaired.

A safety system according to the present invention includes an on-ship system which is provided on a ship and a land system which is provided on land. The on-ship system and the land system each obtain, from a safety detection device and a safety maintenance device which are provided on a ship, data which has been detected by the safety detection device and a signal which indicates a state of the safety maintenance device, and, on the basis of the obtained data and signal, transmit to the safety maintenance device a control signal for controlling the safety maintenance device.

A safety system according to the present invention includes an on-ship system which is provided on a ship and a land system which is provided on land. The on-ship system and the land system each obtain, from a safety detection device and a safety maintenance device which are provided on a ship, data which has been detected by the safety detection device and a signal which indicates a state of the safety maintenance device, and, on the basis of the obtained data and signal, transmit to the safety maintenance device a control signal for controlling the safety maintenance device.

The disclosure provides a method for vessel maintenance optimization, the method comprising the steps of: obtaining operational data of the vessel; calculating a Torque Index; calculating a Slip Index; indicating that propeller cleaning is required if the Torque Index exceeds a Torque Index threshold, and indicating that hull cleaning is required if the Slip Index exceeds a Slip Index threshold.