A method of controlling a turbine of a floating wind turbine structure to reduce fatigue of moorings of the floating wind turbine structure includes curtailing the turbine based on a pitching motion of the floating wind turbine structure and on a wind direction at the floating wind turbine structure relative to an orientation of the moorings of the floating wind turbine structure. Optionally, the curtailment may be further based on a degree of displacement of the floating wind turbine structure from a reference location.

A tuned mass damper (TMD) system in combination with a floating offshore wind turbine (FOWT) platform includes a barge type FOWT platform having a hull configured to have a wind turbine tower mounted thereon. A TMD system is mounted in the hull and has a first TMD configured to operate at a first frequency, and a second TMD configured to operate at a second frequency different than the first frequency.

The present invention concerns a method for controlling the trim of a transport ship without seawater ballast (1), having a width considered along a transverse axis (y′y) of the ship (1), said ship (1) having an unladen weight P.sub.v between 20% and 60% inclusive of its total weight P.sub.T, allowing for a given maximum load weight capacity P.sub.TC, in accordance with the formula:

P.sub.T=P.sub.v+P.sub.TC

at least one first and one second closed liquid tank (3′ or 3″) not communicating with the sea, the total weight P.sub.RT of which when entirely filled with a liquid of specific gravity equal to 1 represents between 2% and 8%, preferably between 3% and 6%, of said unladen weight P.sub.V, said tanks (3′, 3″) being in communication via at least one line to transfer liquid from one to the other and being at a distance d from one another, considering the respective geometric center of each of said tanks (3′, 3″), at least equal to 1/2 when the tanks (3′, 3″) are positioned facing one another essentially along the transverse axis (y′y): d≥1/2.

The present invention concerns a method for controlling the trim of a transport ship without seawater ballast (1), having a width considered along a transverse axis (y′y) of the ship (1), said ship (1) having an unladen weight P.sub.v between 20% and 60% inclusive of its total weight P.sub.T, allowing for a given maximum load weight capacity P.sub.TC, in accordance with the formula:

P.sub.T=P.sub.v+P.sub.TC

at least one first and one second closed liquid tank (3′ or 3″) not communicating with the sea, the total weight P.sub.RT of which when entirely filled with a liquid of specific gravity equal to 1 represents between 2% and 8%, preferably between 3% and 6%, of said unladen weight P.sub.V, said tanks (3′, 3″) being in communication via at least one line to transfer liquid from one to the other and being at a distance d from one another, considering the respective geometric center of each of said tanks (3′, 3″), at least equal to 1/2 when the tanks (3′, 3″) are positioned facing one another essentially along the transverse axis (y′y): d≥1/2.

A pump intake adapter for pumping shallow levels of fluid from a surface to be drained, the pump intake adapter including a connection on the pump intake adapter to convey the fluid away from the pump intake adapter; an intake surface on the pump intake adapter; and a portion of the intake surface of the pump intake adapter that in operation does not contact the surface to be drained, and creates an open conduit between the pump intake adapter and the surface to be drained through which fluid may flow, the open conduit being in fluid communication with the connection on the pump intake adapter. Other systems and methods are provided.

A pump intake adapter for pumping shallow levels of fluid from a surface to be drained, the pump intake adapter including a connection on the pump intake adapter to convey the fluid away from the pump intake adapter; an intake surface on the pump intake adapter; and a portion of the intake surface of the pump intake adapter that in operation does not contact the surface to be drained, and creates an open conduit between the pump intake adapter and the surface to be drained through which fluid may flow, the open conduit being in fluid communication with the connection on the pump intake adapter. Other systems and methods are provided.

A method for ship ballasting includes receiving, at a carbon negative energy storage system, input comprising calcium oxide and water and reacting, within a reaction chamber of the carbon negative energy storage system, the calcium oxide and water to release energy and generate calcium hydroxide. The method includes directing, by the carbon negative energy storage system, the released energy to a requesting end user and providing, by the carbon negative energy storage system, the calcium hydroxide to a marine vessel ballasting system. The method includes releasing a mixture of the calcium hydroxide and ballast water from the marine vessel ballasting system into the ocean to sequester atmospheric CO.sub.2.

A method for ship ballasting includes receiving, at a carbon negative energy storage system, input comprising calcium oxide and water and reacting, within a reaction chamber of the carbon negative energy storage system, the calcium oxide and water to release energy and generate calcium hydroxide. The method includes directing, by the carbon negative energy storage system, the released energy to a requesting end user and providing, by the carbon negative energy storage system, the calcium hydroxide to a marine vessel ballasting system. The method includes releasing a mixture of the calcium hydroxide and ballast water from the marine vessel ballasting system into the ocean to sequester atmospheric CO.sub.2.

According to an embodiment of the present disclosure, a vessel includes: a hull 100 provided with a propellant 140; a deck 200 spaced apart from the hull 100; and a support 300 between the hull 100 and the deck 200, the support 300 configured to support 300 the deck 200 with respect to the hull 100, wherein the hull 100 is disposed below a water surface during operation, and the deck 200 is supported by the support 300 to be disposed above the water surface during operation.

According to an embodiment of the present disclosure, a vessel includes: a hull 100 provided with a propellant 140; a deck 200 spaced apart from the hull 100; and a support 300 between the hull 100 and the deck 200, the support 300 configured to support 300 the deck 200 with respect to the hull 100, wherein the hull 100 is disposed below a water surface during operation, and the deck 200 is supported by the support 300 to be disposed above the water surface during operation.