A watersports boat includes a hull having an underside extending from a forward bow to n aft transom along a longitudinal centerline. The underside defines a running surface that contacts water when the hull moves therein. The underside includes one or more features that enhance the boat's performance.

A watersports boat includes a hull having an underside extending from a forward bow to n aft transom along a longitudinal centerline. The underside defines a running surface that contacts water when the hull moves therein. The underside includes one or more features that enhance the boat's performance.

A sailing vessel is disclosed which comprises a hull, a keel depending from the hull and a mast. A ballast bulb is provided at the lower end of the keel. A first control mechanisms is provided for rotating the ballast bulb about a transverse axis to change the angle of attack of the bulb. A second control mechanism is provided for rotating the bulb about a longitudinal axis of the vessel.

A sailing vessel is disclosed which comprises a hull, a keel depending from the hull and a mast. A ballast bulb is provided at the lower end of the keel. A first control mechanisms is provided for rotating the ballast bulb about a transverse axis to change the angle of attack of the bulb. A second control mechanism is provided for rotating the bulb about a longitudinal axis of the vessel.

A sailing yacht (I) comprising a hull (S) and two drift blades (1,1) coupled to said hull (S), each of said drift blades (1,1) being fixed pivoted to said hull (S) in a symmetrical position with respect to the other blade (1, 1) from opposite side with respect to the longitudinal axis (X) of said hull (S) for rotating independently relative to the other blade (1,1) about a rotation axis (Y,Y) not necessarily parallel to said longitudinal axis (X), and around a rotation vertical axis (R, R) so as to modify the angle of incidence with respect to the flow line of the water, with the possibility when sailing of having ballast (Z,Z) positioned in various positions dynamically modified: each ballast (Z, Z) attached to the respective blade (1,1) and separated; both ballasts (Z, Z) attached to one drift blade (1); both ballasts (Z, Z) attached to the other drift blade (1); both ballasts (Z, Z) attached to said two drift blades (1, 1) and joined.

A sailing yacht (I) comprising a hull (S) and two drift blades (1,1) coupled to said hull (S), each of said drift blades (1,1) being fixed pivoted to said hull (S) in a symmetrical position with respect to the other blade (1, 1) from opposite side with respect to the longitudinal axis (X) of said hull (S) for rotating independently relative to the other blade (1,1) about a rotation axis (Y,Y) not necessarily parallel to said longitudinal axis (X), and around a rotation vertical axis (R, R) so as to modify the angle of incidence with respect to the flow line of the water, with the possibility when sailing of having ballast (Z,Z) positioned in various positions dynamically modified: each ballast (Z, Z) attached to the respective blade (1,1) and separated; both ballasts (Z, Z) attached to one drift blade (1); both ballasts (Z, Z) attached to the other drift blade (1); both ballasts (Z, Z) attached to said two drift blades (1, 1) and joined.

A pressurized air cushioned hull with fixed rigid side, front and rear seals. The hull includes a plurality of keels, with an air cushion disposed between inboard walls of each keel and an air cushion created/disposed along the outboard walls of each keel. These air cushions along the outboard walls of the keels are created by angling each keel by about 0.02 to about 1 relative to the longitudinal axis of the hull, wherein the left keel(s) is rotated clockwise and the right keel(s) is rotated counterclockwise, such that a distance between the keels is smaller at the front end of the keels than at the rear end of the keels. This slight angle was found to allow air, rather than water, to contact the outboard walls, unexpectedly reducing drag resistance a significant amount, thus improving performance of the hull as a whole.

A pressurized air cushioned hull with fixed rigid side, front and rear seals. The hull includes a plurality of keels, with an air cushion disposed between inboard walls of each keel and an air cushion created/disposed along the outboard walls of each keel. These air cushions along the outboard walls of the keels are created by angling each keel by about 0.02 to about 1 relative to the longitudinal axis of the hull, wherein the left keel(s) is rotated clockwise and the right keel(s) is rotated counterclockwise, such that a distance between the keels is smaller at the front end of the keels than at the rear end of the keels. This slight angle was found to allow air, rather than water, to contact the outboard walls, unexpectedly reducing drag resistance a significant amount, thus improving performance of the hull as a whole.

A quick connect system for a boat connects the deck of the boat to the hull of the boat. The deck sits on top of the hull. The hull is preferably inflatable, and preferably in two opposing, symmetrical hull sections being a left hull and a right hull. Each hull preferably has two parallel inflatable tubes that extend from the rear of the hull to the front. The deck is preferably a multi-piece system having a spaced apart front deck rear deck. An elevated casting platform extends between the deck sections and is supported by legs. The hull and deck have a series of aligned rigid tube receivers and loops that receive a series of rails. The rails are slideable into the loops and rigid tube receivers to secure the deck to the keel, and to provide a quick mechanism to disassemble the deck from the tubes.

A quick connect system for a boat connects the deck of the boat to the hull of the boat. The deck sits on top of the hull. The hull is preferably inflatable, and preferably in two opposing, symmetrical hull sections being a left hull and a right hull. Each hull preferably has two parallel inflatable tubes that extend from the rear of the hull to the front. The deck is preferably a multi-piece system having a spaced apart front deck rear deck. An elevated casting platform extends between the deck sections and is supported by legs. The hull and deck have a series of aligned rigid tube receivers and loops that receive a series of rails. The rails are slideable into the loops and rigid tube receivers to secure the deck to the keel, and to provide a quick mechanism to disassemble the deck from the tubes.