Provided is a floating-type on-water support apparatus comprising: a ball in which a guide groove is formed along a circumferential surface thereof; a floating unit including a floating part which floats on water and supports the ball so that the ball is rotatable; and a support rod of which one end is exposed above the water so that a structure is installable thereon and the other end is heavier than the one end so that the support rod stands vertically and which passes through the circumferential surface and is coupled to the ball, wherein the floating unit further includes a restriction protrusion fitted into the guide groove to restrict the ball from being rotated about an axis of the support rod.

An underwater structure includes a half cylinder with ribs arranged on an interior surface. The half cylinder and the ribs are a semi-monocoque structure including a fiber reinforced thermoplastic composite.

A floating mirror includes a buoyant body extending between a first end and a second end, and a reflective material disposed on opposite surfaces of the buoyant body.

Disclosed is buoyant wave energy capture device, adapted to float adjacent to an upper surface of a body of water over which waves pass, and adapted to capture a portion of the radiated waves created by its own rising and falling in response to incident and/or passing environmental waves. A power take off mechanism combined with the disclosed wave energy capture device may be tuned to a specific wave frequency, and thereby optimally extract energy from a motion of a single frequency, even the wave energy capture device may be excited and/or energized by waves of any of a relatively broad range of frequencies, thereby increasing the power-generation and cost efficiencies of such devices relative to wave energy conversion devices of the prior art.

Disclosed is buoyant wave energy capture device, adapted to float adjacent to an upper surface of a body of water over which waves pass, and adapted to capture a portion of the radiated waves created by its own rising and falling in response to incident and/or passing environmental waves. A power take off mechanism combined with the disclosed wave energy capture device may be tuned to a specific wave frequency, and thereby optimally extract energy from a motion of a single frequency, even the wave energy capture device may be excited and/or energized by waves of any of a relatively broad range of frequencies, thereby increasing the power-generation and cost efficiencies of such devices relative to wave energy conversion devices of the prior art.

A propulsion device for a marine vessel. A base is configured to be coupled to the marine vessel. A shaft includes an upper segment and a lower segment each extending along a length axis, wherein the upper segment is coupled to the base. A propulsor is coupled to the lower segment, where the propulsor is configured to propel the marine vessel in water. A shock absorber includes a resilient member that resiliently couples the upper segment and the lower segment together, where the resilient member dampens impact forces received at the lower segment and reduces transfer of the impact forces to the upper segment.

An anti-motion structure of a column floater, being an annular structure surrounding the outer periphery of the bottom of a buoy of the column floater, and an annular radial gap between the two is, or optionally is not, set up. The anti-motion structure is connected to a horizontal roof plate, a horizontal floor plate, an outer annular vertical plate, and an inner annular vertical plate to form an annular box body; and the box body is divided into a plurality of watertight compartments; the horizontal roof plate and/or the horizontal floor plate corresponding to each watertight compartment are provided with damping holes capable of being opened or closed.

A planing boat including: a hull having a boarding area; a screw unit having a screw, and configured to be rotatable with respect to the hull so that the expulsion direction of a water current by the screw can vary by 360 degrees; and a direction change mechanism having a turning drive force source, and configured to change the expulsion direction by rotating the screw unit with respect to the hull with a drive force of the turning drive force source.

A floating structure for supporting a marine wind turbine comprising an emerged tower (21) defined by a tower wall (31), a submerged float (23) defined by a float wall (33) and a float lower end closing wall (34) and a transition element (22) placed in-between and defined by a transition wall (32), wherein the tower wall (31), the float wall (33) and the transition wall (32) have axisymmetric outer surfaces about a central axis (5) respectively defined by a tower generatrix, a float generatrix and a curved concave transition generatrix which is tangent to the tower generatrix, and wherein the axisymmetric outer surface of the float wall (33) has a float upper diameter (D2) equal to the axisymmetric outer surface of the transition wall (32) and bigger than the axisymmetric outer surface of the tower wall (31).

The nacelle of a horizontal axis wind turbine is fixedly mounted on a tower, and the tower is mounted off-center with respect to a ring around which it is rotatable. The tower is a tripod. Two legs of the tripod are of fixed length and lie in a plane perpendicular to the axis of rotation of the turbine blades. The third leg of the tripod is of adjustable length and is aligned with the axis of rotation of the turbine blades. The third leg thus may be controlled to adjust for pitching of the base and other purposes. Multiple turbines, spaced apart laterally, may be mounted on a platform in a fixed orientation, with the platform rotatably mounted off-center relative to a base.