The present disclosure relates to a stand-alone buoy with a seawater battery, which includes a main body formed to have a predetermined buoyancy so as to float on seawater and provided with a seawater space therein and an inlet formed to introduce the seawater into the seawater space, a position notification part installed on the main body and configured to notify a user of a position of the main body, a solar cell part installed on the main body and configured to generate electricity using sunlight, and a seawater battery unit installed in the seawater space to be submerged in the seawater introduced into the seawater space and configured to react with the seawater to store the electricity provided from the solar cell part and to provide the stored electricity to the position notification part so as to operate the position notification part.

An electric power transmission device transmits electric power to an electric power reception device including an electric power reception coil in water. The electric power transmission device includes one or more transmission coils which include an electric power transmission coil configured to transmit electric power to the electric power reception coil via a magnetic field, an electric power transmitter, configured to transmit AC power to the electric power transmission coil, a capacitor which is connected to the transmission coil and forms a resonance circuit which resonates with the transmission coil, a first tubular member which is waterproof and seals a periphery of the transmission coil, a second tubular member which surrounds the first tubular member and includes a plurality of holes, and an adjuster, configured to adjust an amount of air in a gap between the first tubular member and the second tubular member.

A mooring buoy includes a first floating body, a second body slidingly connected to the first and normally submerged, a mooring line connected to the second body by a connector housed in a seat in the first body and movable between a retracted position and a protruding position, enabling fixing the mooring line. The buoy further includes at least one chamber, in one or both of the first and second bodies, a fluid circuit admitting fluid into and out of the chamber, and a control unit connected to the fluid circuit. The control unit controls the fluid circuit to vary the amount of the fluid in the chamber, causing a variation of the immersion depth of the first body with respect to the second body or vice versa and, consequently, movement of the connecting element between the retracted and protruding positions.

A mooring buoy includes a first floating body, a second body slidingly connected to the first and normally submerged, a mooring line connected to the second body by a connector housed in a seat in the first body and movable between a retracted position and a protruding position, enabling fixing the mooring line. The buoy further includes at least one chamber, in one or both of the first and second bodies, a fluid circuit admitting fluid into and out of the chamber, and a control unit connected to the fluid circuit. The control unit controls the fluid circuit to vary the amount of the fluid in the chamber, causing a variation of the immersion depth of the first body with respect to the second body or vice versa and, consequently, movement of the connecting element between the retracted and protruding positions.

A retriever system for retrieving a marine equipment. The retriever system comprises a hollow body having a first opening, a cap adapted to close the first opening of the hollow body and adapted to be removed. A buoyancy assembly housed in the hollow body and adapted to exit the hollow body when the cap is removed. A linkage system maintains the buoyancy assembly linked to the hollow body of the retriever system. The buoyancy assembly comprises first inflatable element and a second inflatable element, and an inflating system configured to, when activated, inflate the first inflatable element, so as to enable exiting of at least the second inflatable element of the buoyancy assembly out of the hollow body. Said inflating system is configured to start or to continue inflating the second inflatable element when said second inflatable element is out of the hollow body.

A retriever system for retrieving a marine equipment. The retriever system comprises a hollow body having a first opening, a cap adapted to close the first opening of the hollow body and adapted to be removed. A buoyancy assembly housed in the hollow body and adapted to exit the hollow body when the cap is removed. A linkage system maintains the buoyancy assembly linked to the hollow body of the retriever system. The buoyancy assembly comprises first inflatable element and a second inflatable element, and an inflating system configured to, when activated, inflate the first inflatable element, so as to enable exiting of at least the second inflatable element of the buoyancy assembly out of the hollow body. Said inflating system is configured to start or to continue inflating the second inflatable element when said second inflatable element is out of the hollow body.

Aquatic structures with adjustable buoyancy constructed in part with a vent valve for a buoyancy control device suitable for divers, where the vent valve may be opened by any combination of over-pressure, manual pressure relief or a powered means, where a force to a valve plug is applied by means of a spring that is constrained to prevent entirely lateral and angular movement but in which movement of the plug in the axis of the seat is unconstrained.

Aquatic structures with adjustable buoyancy constructed in part with a vent valve for a buoyancy control device suitable for divers, where the vent valve may be opened by any combination of over-pressure, manual pressure relief or a powered means, where a force to a valve plug is applied by means of a spring that is constrained to prevent entirely lateral and angular movement but in which movement of the plug in the axis of the seat is unconstrained.

A subsea fluid storage system comprises: a seabed foundation; a tensile member such as a pipe or a wire extending upwardly from the foundation; and a subsea buoy applying buoyant upthrust to support the tensile member in an upright orientation. At least one fluid storage container is disposed between the foundation and the buoy. The or each container may be disposed around the tensile member, for example with the tensile member extending through the container. The container has at least one inlet or outlet for fluid communication with a source or a consumer of fluid to be stored in the container.

An apparatus includes a first member having a housing that encloses a power source and a controller, a second member coupled to the first member that is seeded with a target product, and a sensing module coupled to the first member to allow power from the power source to be transmitted to the sensing module and sensor data from the sensing module to be transmitted to the controller. The sensing module including a sensor oriented toward at least a portion of the second member. The sensor configured to obtain sensor data associated with at least one characteristic of the target product.