Abstract: A boat with a foam material filled keel structure comprising: a buoyant body, which is a U-shaped tube; a bottom plate, set on the bottom of the buoyant body; a tail plate, set at the rear of the buoyant body and the bottom plate; and a keel structure, set on the bottom of the bottom plate; wherein the keel structure is downward depressed, hence a convex part on the bottom and a groove on the top are formed; wherein in the groove of the keel structure is filled with foam material, Thereby it is achieved that water seepage in the keel structure is avoided.

Abstract: A security device comprising: a plate (20) having an upper portion (21) and a lower portion (22), wherein the upper portion and the lower portion are parallel and off-set; a bulbous barrier (30), wherein the upper portion of the plate and the barrier form a slot (50) therebetween, and the barrier extends in a direction perpendicular to the upper portion of the plane of the plate and away from the slot.

Abstract: The hull design for this invention includes a sharp bow, deep V concave shape (“VC”) monohull with a reverse curvature running from a flat straight keel to the upper rail and also encompassing the entire hull length from the bow to the stern. The pointed bow with a bow rudder and a deep flat keel results in a smooth hull for guiding a water column free of a wave and water turbulence to the stern. A mainsail mast and a mizzen shroud slide transversely within limits to promote sail proximity and to achieve increased speed via an improved draft. The mizzen foresail is tacked by moving the mast windward; detaching the mizzen shroud; moving it forward to perform a tacking maneuver, and then moving it aft to a leeward position in relation to the mainsail; and re-attaching the mizzen mast to the moveable traveler.

Abstract: A sailboat includes a canting ballast system configured to rotate with respect to a hull. The sailboat includes the hull having a port side and a starboard side, and an external surface. An arcuate member is coupled to the starboard and port sides extending above the hull. The canting ballast system includes at least one rotatable member coupled to the external surface and to the arcuate member. The system further includes a first strut having a first end and a second end, and a second strut having a first end and a second end wherein the first ends are coupled to the rotatable member. The system also includes at least one ballast. The second ends are coupled to the ballast such that an angle is defined between the first and second struts. The sailboat also includes a drive system coupled to the canting ballast system wherein the at least one drive system is configured to rotate the canting ballast system with respect to the hull.

Abstract: This application covers a light-weight, very fast, super shallow, all-weather, recreational hull that has a mostly flat bottom and that can be used as a sailing vessel, a motor vessel and a surfing platform capable of surfing well-developed ocean swells for long duration and over long distances with speeds over 50 knots, that also has straight diverging sides that have a slight tumblehome, and which hull has 2 multi-finned rotors at its bottom instead of a rudder and keel; and instead of permanent ballast has a series of water buckets along its flat sides to keep the hull's total weight as light as possible; and which buckets can be quickly filled or emptied with outboard water to provide stability control while sailing and surfing; and which hull has pressurized air nozzle and crosswise venturi systems installed in its bottom that can force a sheet of air under the hull on which the hull glides forward with great ease; and that can deploy stern trim surfaces to trim and balance the stern while planing, and w

Abstract: This invention provides improvements in the efficiency of a sailing vessel through the use of flaps, hydrofoils, or members on the keel of a sailing vessel. One or more are positioned at the top, or root of the keel of the vessel, which primarily generate a force in the windward direction to provide a counter-leeward drift force. One or more are located at the bottom, or tip of the keel of the vessel, which primarily generate a force in the leeward direction to provide a counter-heeling moment. Among other benefits, operation of these flaps, hydrofoils, or members during sailing increases the vessel's efficiency, in particular its velocity made good. Further, since they are mounted on one appendage, sailing vessels of a rudder and keel design can be equipped with counter leeward-drift and counter-heeling attributes without the need for additional appendages.

Abstract: A hull (1) for sailing craft enables water gliding performances to be enhanced. The hull (1) for a sailing craft includes a bottom (2) which has a particular profile. The bottom (2) includes a rail (3) shaped from the stem up to the transom, the rail (3) being formed by a flat axial sole (6) linking two parallel passageways of the stem to the transom, of similar width, of similar depth of the water inlet at the transom exit, the passageways derived from the sole (6) have a cross-sectional profile on either side of the sole (6) to form two V-shaped inclined planes (9, 10) and are terminated by two arcs of a quarter circle which are further extended by two other inclined parts (13, 14) forming another V-shape less inclined than the first and leading to the upper works (15, 16). The invention is applicable to boats.

Abstract: A hull is formed of a forward section and rearward sections and intermediate sections there between. A saloon has a transparent front extending upwardly from the forward section with sides extending upwardly from the rearward sections and a roof coupling the front and sides at an elevated location. The saloon has a floor coupling the forward and rearward sections of the hull to form a room between front and sides and beneath the roof.

Abstract: An amah for a high speed seagoing multi hulled vessel, the amah having sides extending upwardly and outwardly from a base line, the sides having longitudinally extending vertically spaced stiffeners, the bow of the amah including a plate field comprising a plurality of sub plates each comprising a vertical plate secured along the centre line of the amah and supporting a horizontal plate secured to each side of the amah, whereby the planes of the horizontal plates of the sub plates step upwardly as the base line rakes upwardly towards the bow and the longitudinal stiffeners terminate and are secured to the horizontal plates.

Abstract: A hull is formed of a forward section, a rearward section and intermediate sections there between. The forward section is in a generally triangular configuration. The forward section has a forward-most point. The forward section has rearwardly extending sides. The rearward sections are formed of exterior and interior walls. A space is provided between the interior and exterior walls. The intermediate sections are formed in a generally triangular configuration. The intermediate section have a forward-most point. The intermediate sections have rearwardly extending interior walls and laterally spaced exterior walls. A saloon is above water level and is secured to the top and interior walls of the hull. The saloon has a front at the rearward end of the intermediate section. The saloon has a rear spaced forward of the end of the unitary hull.

Abstract: A shaped hull with a fixed angle keel with respect to the hull that when heeled, orients the keel to an angle of attack substantially related to the heel angle. The angle of attack being sufficient to create on the keel a lateral force substantially equal and opposite to the lateral force derived from the wind. The submerged portion of the hull, however, remains symmetrical and oriented parallel to the course sail as is its associated drag contribution vector. Thereby reducing or substantially eliminating the lateral force generated by the hull and the associated drag contribution. The movement of the shaped hull induces a lateral force on the keel without generating a lateral force and its associated drag on the hull, thus providing a sailboat with reduced drag without resorting to the prior art methods and their associated disadvantages.