Electrical power may be provided to a subsea system, which may include one or more battery packs, from a subsea power system comprising a surface buoy which comprises an electrical power generator and a surface buoy power outlet operatively in communication with the power generator; a subsea battery bank which comprises a predetermined set of batteries, a subsea battery bank power inlet operatively in communication with the surface buoy power outlet and with the predetermined set of batteries, and a subsea battery bank power outlet operatively in communication with the predetermined set of batteries. The subsea power system is deployed at sea, by way of example and not limitation including by use of an autonomous vehicle, and generates electrical power at the power generator which may be provided to the subsea battery bank or other structures requiring electrical power subsea.

A method of assembling a pipe on a water-supported floating platform is provided. The platform includes an open central bay, and a gantry on the platform is arranged so as to surround at least a portion of the bay. The method includes providing a pipe intake assembly and staves on the platform; transferring the pipe intake assembly to the interior space of the bay; assembling the individual staves on the pipe intake assembly in an offset construction; lowering the pipe portion within the bay and into the water until the upper ends of the staves reside within a lower portion of the gantry; increasing the length of the pipe portion by assembling additional staves to the upper ends of the assembled staves; and repeating the step of increasing the length of the portion of the pipe until the pipe has a desired length.

A method of assembling a pipe on a water-supported floating platform is provided. The platform includes an open central bay, and a gantry on the platform is arranged so as to surround at least a portion of the bay. The method includes providing a pipe intake assembly and staves on the platform; transferring the pipe intake assembly to the interior space of the bay; assembling the individual staves on the pipe intake assembly in an offset construction; lowering the pipe portion within the bay and into the water until the upper ends of the staves reside within a lower portion of the gantry; increasing the length of the pipe portion by assembling additional staves to the upper ends of the assembled staves; and repeating the step of increasing the length of the portion of the pipe until the pipe has a desired length.

A floating power generation system includes a marine vessel, an energy conversion system mounted on the marine vessel, and a fuel storage system mounted on the marine vessel. The energy conversion system includes a hydrogen fuel cell, and the fuel storage system is fluidly connected to the energy conversion system. The fuel storage system supplies hydrogen fuel to the hydrogen fuel cell of the energy conversion system.

An offshore drilling vessel includes a hull and at least one opening in the hull arranged to receive an end of at least one submersible cable. The offshore drilling vessel also comprises a cable capture mechanism configured to lift the end of the at least one submersible cable through the at least one opening from a submersed position to a raised position. A cable connector is configured to couple to the end of the at least one submersible cable when the end of the at least one submersible cable is in the raised position such that the offshore drilling vessel comprises an external data and/or power connection via the submersible cable.

An offshore LNG processing plant includes a first module including a personnel accommodation facility on a first vessel, a second module including a gas treatment facility on a second vessel, and a third module including a gas liquefaction facility on a third vessel. Each of the first, second, and third modules are assembled on the corresponding vessels, and then transported to an offshore location in a body of water, such as a river, a lake, or a sea. At the offshore location, each vessel deploys legs to the bed of the body of water to raise a hull of each vessel out of the water. The first module is then coupled to the second module, and the second module is coupled to the third module. A fourth module on a fourth vessel is coupled to the third module to provide LNG storage.

A modular section of water pipe (114) includes: a deformable membrane (130) able to encompass, in an operational state of the section, a tubular space (132) defining an axial direction (AA) to conduct water, and a series (135) of rings (120, (140) extending along the axial direction (AA) in the tubular space (132), and including: two end rings (120), each being at a separate end (116, 118) of the section (114) along the axial direction (AA), the membrane (130) being fastened to the end rings (120), at least one central ring (140), arranged between the two end rings (120), and cables (150, 160) connecting each ring (120, 140) to the closest ring (120, 140) along the axial direction (AA).

An offshore energy generation system (OEGS), is described. The offshore energy generation system delivers clean energy in the form of electricity and/or ammonia (NH3) and freshwater to offshore or onshore consumers. By deploying this offshore energy generation system, the net zero emissions targets from IPCC can be achieved and the water scarcity crisis mitigated. The offshore energy generation system enables better safety of the population served, optimal use of land, eliminate land use conflicts and enables the protection of the world cultural heritage. The offshore energy generation system comprises of an electric power generation system based on nuclear or hydrogen (H2) fuel cells, ammonia generation, freshwater generation, offshore cranes, data processing centers, blockchain, helideck, telecommunications system, automation and control system, nitrogen and hydrogen generation systems.

Systems and methods for generating electrical power from marine environment thermal gradients. The systems and methods include a buoyancy-driven submersible designed to harness ocean thermal gradients to produce electrical power using thermoelectric generators and phase change materials. The buoyancy-driven submersible is configured to travel vertically in reciprocating motion across a temperature gradient between different depths of a body of water along a cable.

Described herein are watercraft comprising a hull comprising a first hull assembly, and a second hull assembly opposite the first hull assembly and parallel to the first hull assembly; and a frame configured to couple the first hull assembly to the second hull assembly. In some embodiments, the first hull assembly comprises a first quarter hull coupled to a second quarter hull, and the second hull assembly comprises a third quarter hull coupled to a fourth quarter hull. In some embodiments, the first and third quarter hulls are substantially reflectively duplicative of the second and fourth quarter hulls. In some embodiments, the first hull assembly is substantially reflectively symmetrical to the second hull assembly. Various embodiments may further include a roof comprising one or more energy harvesting arrays thereon. The roof may be movable, in various embodiments, between a closed configuration and an open configuration.