An unmanned, autonomous, ocean-going vessel including a primary hull and a rigid wing rotationally coupled with the primary hull that freely rotates about a rotational axis. At least one of the primary hull and the rigid wing includes at least one selectively floodable compartment configured to selectively flood to submerge the primary hull and at least a portion of the rigid wing. The vessel further includes at least one controller configured to maintain a desired heading. The vessel further includes a control surface element configured to aerodynamically control a wing angle of the rigid wing based on a force exerted by wind on the control surface element. The vessel further includes a rudder. The at least one controller is further configured to determine a rudder position and generate a signal to position the rudder. The vessel further includes a keel coupled with the primary hull.

A system for installing a band around a rigid subsea structure includes a remotely operated vehicle (ROV) having a main body. A set of jaws extendable beyond an outer perimeter of the main body are coupled to the ROV. The system also includes a band distribution system operatively and a band installation mechanism operatively coupled to the ROV.

An apparatus includes first and second tanks each configured to receive and store a refrigerant under pressure. The apparatus also includes at least one generator configured to receive flows of the refrigerant between the tanks and to generate electrical power based on the flows of the refrigerant. The apparatus further includes first and second hydraulic drives associated with the first and second tanks, respectively. Each hydraulic drive includes a first piston within the associated tank, a channel fluidly coupled to the associated tank and configured to contain hydraulic fluid, and a second piston within the channel and configured to move within the channel in order to vary an amount of the hydraulic fluid within the associated tank and vary a position of the first piston within the associated tank. The channel of each hydraulic drive has a cross-sectional area that is less than a cross-sectional area of the associated tank.

Disclosed is a method and system to provide aResetting Anchor/Antenna Tether Mechanism (RAATM) to provide, according to an exemplary embodiment, dual anchoring and antenna capabilities to autonomous underwater vehicles (AUVs). The RAATM is resettable; an AUV can anchor at one location for a period of time, retrieve the anchor, move to a new location, and redeploy the anchor. Furthermore, the RAATM tether may also be used as an antenna for radio communications while deployed; this may allow smaller AUVs to accomplish missions that would otherwise require larger AUVs with dedicated antennas.

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.

Disclosed is a system for underwater exploration using a submerged device towed by a surface vessel, the submerged device being connected to the vessel by a towing line and including equipment supplied by the electricity, characterized in that the submerged device includes at least one device for the local production of electrical energy, the device being an electric hydrogenerator and in that the towing line has no electrical supply cable connecting the vessel to the submerged device.

The present disclosure generally relates to a monocoque body for an unmanned underwater vehicle (“UUV”) comprising a nose portion, a tail portion, a body interior surface, a body exterior surface. The monocoque body can be a one-piece structural shell made of fiber reinforced polymer. The UUV may further include transverse structural members.

Ultra-large marine submersible transport boats and arrangements for aqueous bulk liquids transportation, including fresh water and irrigation drainage, from specifically configured supply stations to specifically configured delivery stations. Boats present rigid hydrodynamic shaped double-walled submersible hulls incorporating a plurality of inside-reinforced impervious ballast chambers and also present radial reinforcing elements and hollow interior cavities that enclose collapsible bulk liquid bladders for transporting bulk liquids. Hulls can be made of reinforced concrete. Hull openings permit seawater circulation, avoiding transportation of bulk ballast seawater. Submersible cruising reduces structural loads and drag. An on-board hydro-pneumatic ballasting system adds to and removes reusable hull ballast water from, the ballast chambers controlling the hull's depth, pitch, and roll. Propulsion, steering capabilities, and detailed arrangements and methods for loading, unloading, and transporting bulk liquids are presented. Hull manufacturing is done on marine floating platforms using onshore precast panels. Maintenance and end of life procedures are detailed.

A flexible lifting tether system for lifting a marine vehicle or object is described which is capable of significantly improving the primary characteristics of an existing cable by enhancing load-carrying capabilities (e.g. in air), modifying the tether to have altered specific gravities in water, and relieving torsional stresses when in operation.