A modular multipurpose offshore operation platform comprises a floating structure having a lower portion submerged below the surface of the sea, and a platform structure provided at an upper surface of the floating structure. An integrated work platform comprises at least two modular multipurpose offshore operation platforms. Framework structures of two adjacent operation platforms are detachably and fixedly connected, and floor boards of the operation platforms collectively form a deck. A transportation method transports goods to the platform by means of a hoist, and a hoist bracket with a rotating roller. The platform can achieve standardized production, and is flexible and has multiple functions.

A submarine vehicle may include a storage area for storing loads. The submarine vehicle may further include a pressure hull. The submarine vehicle is configured to pick loads up from a seabed and/or set loads down on the seabed. The storage area may be positioned outside the pressure hull and, in some examples, between numerous pressure hulls. Further, the storage area may include a lower hatch disposed on an underside of the pressure hull or an upper hatch disposed on a top side of the pressure hull. Some submarine vehicles may include a load transporting system for picking the load up from the seabed, setting the load down on the seabed, and/or conveying the load within the storage area.

A submarine vehicle may include a storage area for storing loads. The submarine vehicle may further include a pressure hull. The submarine vehicle is configured to pick loads up from a seabed and/or set loads down on the seabed. The storage area may be positioned outside the pressure hull and, in some examples, between numerous pressure hulls. Further, the storage area may include a lower hatch disposed on an underside of the pressure hull or an upper hatch disposed on a top side of the pressure hull. Some submarine vehicles may include a load transporting system for picking the load up from the seabed, setting the load down on the seabed, and/or conveying the load within the storage area.

A trolley for a lift assembly is disclosed. The trolley includes a drive portion and a lift portion separable from the drive portion. The lift portion includes one or more fittings configured to hold one or more wire ropes for raising and lower a platform hitched to the wire ropes. The drive portion is connectable to a drive assembly to move the drive portion and lift portion along a lift stroke. Pairs of trolleys are interconnected via tension lines or wires connected to the lift portions of the trolleys. The lift portions are configured to move independent of the drive portions through lift provided via the interconnection of the lift portions through the tension lines or wires.

A trolley for a lift assembly is disclosed. The trolley includes a drive portion and a lift portion separable from the drive portion. The lift portion includes one or more fittings configured to hold one or more wire ropes for raising and lower a platform hitched to the wire ropes. The drive portion is connectable to a drive assembly to move the drive portion and lift portion along a lift stroke. Pairs of trolleys are interconnected via tension lines or wires connected to the lift portions of the trolleys. The lift portions are configured to move independent of the drive portions through lift provided via the interconnection of the lift portions through the tension lines or wires.

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 stone dumping real time measuring system for a stone dumping vessel includes a boom. The boom is mounted to a control cabin of the stone dumping vessel and can extend outwardly from the control cabin to be located above a predetermined stone dumping position. A signal line hangs from the boom. A floater is connected to the other end of the signal line. The floater is provided with a positioning device, a surge compensator, and a depth sounder. The floater freely floats on the water through the separate design of the floater and the stone dumping vessel. The floater is directly positioned by the positioning device of the floater, and the surge compensator is able to correct a measurement error of the depth sounder to instantly report the stone dumping result and to improve the accuracy and precision of the stone real time measuring system.

A vessel for e.g. well intervention or deep sea lowering, comprises a moon pool and a hoisting arrangement for lowering and retrieving items, in particular equipment, tools, and/or supplies or modules comprising the same, through the moon pool, into respectively from the sea and onto respectively from the seabed or an installation on the seabed. The vessel further comprises one or more guides for laterally retaining items inside the moon pool, preferably at least two guides positioned on opposite sides of the moon pool.

A vessel for e.g. well intervention or deep sea lowering, comprises a moon pool and a hoisting arrangement for lowering and retrieving items, in particular equipment, tools, and/or supplies or modules comprising the same, through the moon pool, into respectively from the sea and onto respectively from the seabed or an installation on the seabed. The vessel further comprises one or more guides for laterally retaining items inside the moon pool, preferably at least two guides positioned on opposite sides of the moon pool.