A swimming propulsion device. The swimming propulsion device includes a fuselage at least one propulsor pivotally connected to the fuselage, and in some embodiments, at least one stabilizer affixed to the fuselage. The device also includes a swimmer connection mechanism removably attached to the fuselage by a locking mechanism whereby the swimmer connection mechanism connects a swimmer to the device, and a control mechanism installed within the propulsor. A method for efficient swimming is also disclosed.

A swimming propulsion device. The swimming propulsion device includes a fuselage at least one propulsor pivotally connected to the fuselage, and in some embodiments, at least one stabilizer affixed to the fuselage. The device also includes a swimmer connection mechanism removably attached to the fuselage by a locking mechanism whereby the swimmer connection mechanism connects a swimmer to the device, and a control mechanism installed within the propulsor. A method for efficient swimming is also disclosed.

The invention relates to a kayak comprising a light and stylish hull with a propeller mounted on the underside thereof, said propeller being actuatable by means of pedals mounted in front of and above a seat, the pedals and propeller being connected by means of a transmission that passes through the inside of the hull and below the surface thereof. Two rudders are arranged at the rear.

The invention relates to a kayak comprising a light and stylish hull with a propeller mounted on the underside thereof, said propeller being actuatable by means of pedals mounted in front of and above a seat, the pedals and propeller being connected by means of a transmission that passes through the inside of the hull and below the surface thereof. Two rudders are arranged at the rear.

The present invention relates to a human-powered boat that a user can easily operate with his/her own manual power even though the boat is in a form causing large resistance to propulsion, and the human-powered boat is equipped with a propulsion apparatus that imitates the tail fin of a fish. The propulsion apparatus, in which an oscillating foil mechanism is applied to an “L-shaped oar”, enables a rider to perform forward-facing rowing and can easily change a direction and prevent damage due to a collision with an underwater obstacle. Typically, the human-powered boat of the present invention has the following three limitations in order to maximize simplicity while maintaining propulsion efficiency, compared with prior arts in the same technical field: First, a rider has a specific limitation in tilting the propulsion apparatus through an up-down movement of his/her arm. Second, the foil of the propulsion apparatus does not make contact with the longitudinal axis of the boat body in a predetermined range of motion. Third, the propulsion apparatus has a predetermined level of limitation in generating a propulsion force below the submerged portion of the boat body.

A personal bipedal watercraft includes a pair of skis. Each ski of the pair of skis includes a floating hull. A deck is secured to the hull. A binding on each deck is configured to receive a foot of a user. A plurality of paddle assemblies are moveably secured to an underside of the floating hull. The paddle assemblies each include a blade and a fin.

A personal bipedal watercraft includes a pair of skis. Each ski of the pair of skis includes a floating hull. A deck is secured to the hull. A binding on each deck is configured to receive a foot of a user. A plurality of paddle assemblies are moveably secured to an underside of the floating hull. The paddle assemblies each include a blade and a fin.

A multi-purpose personal watercraft for deployment in different configurations as desired by a user. The multi-purpose personal watercraft comprises a base frame which forms a watercraft base which includes side extensions, an aft floor board, and a bow portion, as well as two opposing mirror image side floats with which the base frame is selectively integrated. When in place, the opposing side floats form the multi-purpose personal watercraft's U shaped hull and enable the selective attachment of a rudder assembly behind the multi-purpose personal watercraft's stern. With respect to propulsion, base frame is configured to enable the selective deployment of pedal propellers, a user's legs, or a trolling motor. A dual steering system enables the control of up to two discrete steering mechanisms from a single position on the watercraft.

The invention relates to an interface for mounting a propulsion mechanism to a watercraft such as a fishing kayak, and to a watercraft comprising such an interface. The interface comprises a first portion including a first plate with a hole sized and shaped for receiving therethrough a portion of the propulsion mechanism, a second portion including a second plate and one channel extending from the second plate, the channel being in registry with the hole of the first portion for therein a portion of the propulsion mechanism. The interface also comprises fastening assemblies for removably fastening the second portion to the first portion of the interface, and a guiding assembly for maintaining the channel of the second portion in registry with the hole of the first portion.

The invention relates to an interface for mounting a propulsion mechanism to a watercraft such as a fishing kayak, and to a watercraft comprising such an interface. The interface comprises a first portion including a first plate with a hole sized and shaped for receiving therethrough a portion of the propulsion mechanism, a second portion including a second plate and one channel extending from the second plate, the channel being in registry with the hole of the first portion for therein a portion of the propulsion mechanism. The interface also comprises fastening assemblies for removably fastening the second portion to the first portion of the interface, and a guiding assembly for maintaining the channel of the second portion in registry with the hole of the first portion.