Abstract: A floating offshore wind turbine assembly unit useful for assembling or maintaining wind turbines at an offshore location is disclosed. The floating offshore wind turbine assembly unit may include a first vessel spaced a distance apart from a second vessel, and an extended deck coupled to the first vessel and the second vessel. The extended deck is positioned in the distance between the first vessel and the second vessel, and the extended deck is configured as a dry dock disposed or movable to a height above a sea level. In some embodiments, the extended deck or a portion thereof is movably coupled to the first vessel and the second vessel. For example, the extended deck or a portion thereof is movable between a submerged or near sea level position and a position above a sea level.

Abstract: A split mooring system may include at least two vessels in a body of water and a plurality of mooring lines. The plurality of mooring lines may be attached to the at least two vessels and configured to fix and maintain a position of the at least two vessels in the body of water relative to each other. A first vessel of the at least two vessels may be adjacent to a second vessel of the at least two vessels. The plurality of mooring lines may be attached to sides of the first vessel and the second vessel. The sides of the first vessel and the second vessel with mooring lines may face open water of the body of water.

Abstract: A truss system may include a plurality of beams. Each beam of the plurality of beams may have various cross-sectional sizes in a same plane. Additionally, the plurality of beams may have a geometric arrangement such that a structural weight at required strength level may be reduced to achieve optimal design.

Abstract: A method of connecting a member to a floating structure, the method includes disposing the floating structure in a body of water and attaching the member to the floating structure. The method also includes changing an orientation of the floating structure and aligning the member with a connection device disposed on a lower portion of the floating structure.

Abstract: An attachment system for an offshore structure includes a porch configured to be affixed to the offshore structure, an adaptor configured to engage with one or more plates of the porch, and a latch to retain the adaptor into engagement with the one or more plates, in which the adaptor is configured to support an equipment device. A method of attaching equipment device to a structure includes affixing a porch of an attachment system to the structure, engaging an adaptor with one or more plates of the porch, and attaching an equipment device to the adaptor.

Abstract: A method of connecting a member to a floating structure, the method includes disposing the floating structure in a body of water and attaching the member to the floating structure. The method also includes changing an orientation of the floating structure and aligning the member with a connection device disposed on a lower portion of the floating structure.

Abstract: A support structure includes a column having multiple sides. A first side and a second side of the column are disposed at a first angle with respect to another. The second side and a third side of the column are disposed at a second angle with respect to another. The third side and a fourth side of the column are disposed at a third angle with respect to another. The fourth side and a fifth side of the column are disposed at a fourth angle with respect to another. The fifth side may be disposed at a fifth angle with respect to a sixth side and/or the first side of the column, in which the sixth side and the first side of the column may be disposed at a sixth angle with respect to another.

Abstract: An attachment system for an offshore structure includes a porch configured to be affixed to the offshore structure, an adaptor configured to engage with one or more plates of the porch, and a latch to retain the adaptor into engagement with the one or more plates, in which the adaptor is configured to support an equipment device. A method of attaching equipment device to a structure includes affixing a porch of an attachment system to the structure, engaging an adaptor with one or more plates of the porch, and attaching an equipment device to the adaptor.

Abstract: A semi-submersible offshore structure, including a deck supported by a plurality of support columns, a submersible pontoon structure having the plurality of support columns extending to the deck therefrom, and a support spacer disposed between a sea bed and the pontoon structure.

Abstract: A support structure includes a column having multiple sides. A first side and a second side of the column are disposed at a first angle with respect to another. The second side and a third side of the column are disposed at a second angle with respect to another. The third side and a fourth side of the column are disposed at a third angle with respect to another. The fourth side and a fifth side of the column are disposed at a fourth angle with respect to another. The fifth side may be disposed at a fifth angle with respect to a sixth side and/or the first side of the column, in which the sixth side and the first side of the column may be disposed at a sixth angle with respect to another.