This invention is directed to a column floater with extended cylinder and a ring buoy-group, which comprises an upright buoy at a water surface, an extended cylinder, a positioning system and a topsides. The top of the upright buoy is above the water surface and a moonpool is either set or not in the center of the upright buoy through the top to the bottom. The extended cylinder, connecting to the bottom of the upright buoy and extending downwards, includes two types of fixed and sliding to form a column floater with fixed extended cylinder and a column floater with sliding extended cylinder respectively. The positioning system is one or two combined of mooring system and DP system. The column floater with extended cylinder is a new type floating platform with multi-purpose, combining advantages of the spar platform and the current cylindrical FPSO, high performance, safety and reliability.

The invention relates to a vessel (1) comprising a hull (2) for non-planing operation, during operation displaying a waterline (3) and having a forward direction in a horizontal plane (4) with a forward portion, an aft portion (5), and a central portion, the aft portion having a smaller water displacement relative to a water displacement of the central portion; and an aft, primary foil (6) affixed to the aft hull portion with a connecting member (7), configured to be below the waterline during operation, spaced from the hull, the aft foil having a span, a chord, a profile, a leading edge (8) and a trailing edge (9) relative to the forward direction, characterized by adjustment means (10) connected to the aft foil and configured for adjusting an angle of incidence (.sub.c, af) of the chord of the aft foil.

A stabilizer device for a watercraft with a hull. The stabilizer device includes a fin blade with a fin base, a fin tip, a leading edge, and a trailing edge, wherein a blade forward direction (fb) is defined from the trailing edge to the leading edge at the fin base, wherein the fin blade comprises a first fin connection element connected to the fin base in a first connection point a hull element arranged to be fixed to the hull with a hull forward direction (fh) in a forward direction of the hull, and a fin blade displacement portion connected to the first fin connection element and the hull element and arranged for displacing the first fin connection point a first displacement, in parallel with a lower surface of the hull, and perpendicular to the hull forward direction (fh).

A wave energy converter deep sea mounting system consists of a floatable platform, an enclosure, a wave energy converter mechanism, a generator, a float arm, and a float. The enclosure is mounted atop the floatable platform by an enclosure support axle, about which the enclosure can rotate. The wave energy converter mechanism and the electrical generator are mounted within the enclosure. The float arm is connected between the enclosure and a stationary float, and as the floatable platform rises and falls due to wave action, the enclosure is thus rotated. The wave energy converter mechanism has a stationary input pulley connected through at least one pulley system to a generator output pulley, multiplying input rotations from the float arm action to the electrical generator in order to generate electricity. As the enclosure rotates about the stationary input pulley, the remaining pulleys are forced to spin through rotation about the stationary input pulley.

A wave energy converter deep sea mounting system consists of a floatable platform, an enclosure, a wave energy converter mechanism, a generator, a float arm, and a float. The enclosure is mounted atop the floatable platform by an enclosure support axle, about which the enclosure can rotate. The wave energy converter mechanism and the electrical generator are mounted within the enclosure. The float arm is connected between the enclosure and a stationary float, and as the floatable platform rises and falls due to wave action, the enclosure is thus rotated. The wave energy converter mechanism has a stationary input pulley connected through at least one pulley system to a generator output pulley, multiplying input rotations from the float arm action to the electrical generator in order to generate electricity. As the enclosure rotates about the stationary input pulley, the remaining pulleys are forced to spin through rotation about the stationary input pulley.

A marine wind power generation floating body according to an embodiment of the present disclosure can be coupled to a tower used for wind power generation and is provided at sea. The marine wind power generation floating body includes a floating main body which is formed at a predetermined length and which has a circular transverse cross section, a ballast part positioned on one side of the floating main body, a damping plate positioned at one end of the floating main body, and formed with a diameter that is larger than the outer diameter of one side of the floating main body, and a pitching/rolling damping part which is positioned on the other side of the floating main body, and which damps the horizontal pitching and rolling of the floating main body.

A buoyant structure has a hull having a main deck, a lower inwardly-tapering frustoconical side section that extends from the main deck, a lower generally round section extending from the lower inwardly-tapering frustroconical side section, a keel having an n-polytope shape, a plurality of separate tunnels between columns extending from the keel having an n-polytope shape and a fin-shaped appendage is secured to a lower and an outer portion of the hull. The at least one tunnel contains water at operational depth of the buoyant structure.

A flare-type tension leg floating wind turbine foundation is provided, which includes a top support platform configured to support a tower frame, a blade and a wind turbine generator set; a bottom support structure connected to a plurality of tension legs; at least three hollow upright columns connected between the top support platform and the bottom support structure and arranged around a vertical center line of the floating wind turbine foundation, each of the at least three upright columns being inclined outward from a lower end to an upper end with respect to the vertical center line of the floating wind turbine foundation; and a ballast adjusting system provided in the upright columns and/or the bottom support structure.

A structure of a floating, semi-submersible wind turbine platform is provided. The floating wind turbine platform includes three elongate stabilizing columns, each having a top end, a keel end, and an outer shell containing an inner shaft. Each stabilizing column further includes a water entrapment plate. The floating wind turbine platform also includes three truss members, each truss member including two chord members and two diagonal members. The truss members connect the stabilizing columns to form a triangular cross-section. An elongate wind turbine tower is disposed over the top end of one of the three stabilizing columns.

A buoyant structure with a hull, a main deck, a lower inwardly-tapering frustoconical side section; a lower generally rounded section extending from the lower inwardly-tapering frustoconical side section; a generally rounded keel; a fin-shaped appendage secured to a lower and an outer portion of the hull proximate the generally rounded keel. In embodiments, the keel has a first frame extending from the keel and a first keel extension connected to the first frame.