Embodiments include a retrofit pontoon system including a pontoon, the pontoon having a pontoon body defining a first cavity, a retrofit assembly, the retrofit assembly including a tube, wherein the tube is sized to pass through a first aperture formed in the pontoon body and a selectively fillable container, where the tube is operably coupled with the selectively fillable container, and a pump, the pump being coupled with the tube such that operation of the pump selectively fills and drains water from the selectively fillable container, where filling the selectively fillable container lowers the profile of the pontoon in the water and emptying the selectively fillable container raises the profile of the pontoon in the water.

A portable, pumpless water ballast system can be constructed of a flexible water-proof membrane molded or formed of welded panels to make a desired shape, such as cube-shaped when filled with water. Along the top side is an opening for filling the container. A water-proof closure is provided in the opening to prevent water leaking out. An air release valve can be installed near the top area of the container's top or side panels. A handle or strap can also be provided on one or more of the adjacent sides of the container. A plastic threaded drain and closure can be provided on one or more sides to allow for emptying of the container or to attach other features like a hose or other accessory.

A portable, pumpless water ballast system can be constructed of a flexible water-proof membrane molded or formed of welded panels to make a desired shape, such as cube-shaped when filled with water. Along the top side is an opening for filling the container. A water-proof closure is provided in the opening to prevent water leaking out. An air release valve can be installed near the top area of the container's top or side panels. A handle or strap can also be provided on one or more of the adjacent sides of the container. A plastic threaded drain and closure can be provided on one or more sides to allow for emptying of the container or to attach other features like a hose or other accessory.

Various embodiments of a submerged submersible sailing vessel are disclosed. Such a submerged sailing vessel may comprise a submersible hull assembly, a keel coupled to and extending upwards from hull assembly towards a water surface, and a wind-catching assembly coupled to and extending upwards into the air from the keel for propelling the submerged sailing vessel. The hull assembly and the keel are submerged below the water surface as the vessel is propelled by the wind-catching assembly above the water surface.

Various embodiments of a submerged submersible sailing vessel are disclosed. Such a submerged sailing vessel may comprise a submersible hull assembly, a keel coupled to and extending upwards from hull assembly towards a water surface, and a wind-catching assembly coupled to and extending upwards into the air from the keel for propelling the submerged sailing vessel. The hull assembly and the keel are submerged below the water surface as the vessel is propelled by the wind-catching assembly above the water surface.

A reverse osmosis water production apparatus for use in a body of water includes a first section defining a buoyancy chamber and an elongate second section connected to the first section and configured to define an elongate chamber which extends downward beneath a waterline in use. The elongate chamber is provided with a plurality of elongate reverse osmosis membrane tubes, each tube containing a reverse osmosis membrane. A longitudinal axis of each reverse osmosis membrane tube is substantially parallel with a longitudinal axis of the elongate chamber and the reverse osmosis membrane tubes are arranged around a passage.

A reverse osmosis water production apparatus for use in a body of water includes a first section defining a buoyancy chamber and an elongate second section connected to the first section and configured to define an elongate chamber which extends downward beneath a waterline in use. The elongate chamber is provided with a plurality of elongate reverse osmosis membrane tubes, each tube containing a reverse osmosis membrane. A longitudinal axis of each reverse osmosis membrane tube is substantially parallel with a longitudinal axis of the elongate chamber and the reverse osmosis membrane tubes are arranged around a passage.

This invention relates to a modular structure for a floating infrastructure. The modular structure comprises a base slab; a basement slab; a base cell form between the base slab and the basement slab; a platform deck; an external waterproof wall extending from a perimeter of the base slab to a perimeter of the platform deck; a honeycomb double wall provided along an internal surface of the external waterproof wall; a bottom hull defined between the base slab and basement slab, wherein the base cell form is between the base slab and the basement slab; and a top hull defined between the basement slab and platform deck, a plurality of columns between the base slab and the platform deck wherein the plurality of columns in the bottom hull are evenly distributed within the honeycomb double wall and the plurality of columns in the top hull are not evenly distributed.

This invention relates to a modular structure for a floating infrastructure. The modular structure comprises a base slab; a basement slab; a base cell form between the base slab and the basement slab; a platform deck; an external waterproof wall extending from a perimeter of the base slab to a perimeter of the platform deck; a honeycomb double wall provided along an internal surface of the external waterproof wall; a bottom hull defined between the base slab and basement slab, wherein the base cell form is between the base slab and the basement slab; and a top hull defined between the basement slab and platform deck, a plurality of columns between the base slab and the platform deck wherein the plurality of columns in the bottom hull are evenly distributed within the honeycomb double wall and the plurality of columns in the top hull are not evenly distributed.

A semi-submersible offshore platform for operations in a body of water includes a buoyant hull configured to be at least partially submerged in the water. In addition, the platform includes an equipment deck coupled to the hull and configured to be positioned above the water. The hull includes a first vertical column and a second vertical column horizontally spaced from the first vertical column. Each column has a longitudinal axis, an upper end, a lower end, and a tapered section axially positioned between the upper end and the lower end. Further, the hull includes a horizontal pontoon having a longitudinal axis, a first end coupled to the lower end of the first column, and a second end coupled to the lower end of the second column.