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.

This disclosure provides improved nautical craft that can travel and navigate on their own. A hybrid vessel is described that converts wave motion to locomotive thrust by mechanical means, and also converts wave motion to electrical power for storage in a battery. The electrical power can then be tapped to provide locomotive power during periods where wave motion is inadequate and during deployment. The electrical power can also be tapped to even out the undulating thrust that is created when locomotion of the vessel is powered by wave motion alone.

This disclosure provides improved nautical craft that can travel and navigate on their own. A hybrid vessel is described that converts wave motion to locomotive thrust by mechanical means, and also converts wave motion to electrical power for storage in a battery. The electrical power can then be tapped to provide locomotive power during periods where wave motion is inadequate and during deployment. The electrical power can also be tapped to even out the undulating thrust that is created when locomotion of the vessel is powered by wave motion alone.

A personal watercraft includes a floatation member, a thrust assembly, a steering assembly, and a braking assembly. The assemblies may be actuated either mechanically or electrically. The thrust assembly is human powered, solar powered, or electric powered. The thrust, steering, and braking assemblies can be added after-market to an existing stand-up paddle board (SUP), or built into one or a plurality of SUPs during initial manufacturing. When the thrust assembly is human powered, it is leg or arm powered. When the thrust assembly is leg powered, the legs can move backward and forward in a sliding motion, up and down in a stomping fashion, or move in a loop trajectory. When the thrust assembly is arm powered, the arms can move forward/backward together or separately. The thrust assembly includes one or a plurality of paddles or flippers that are positioned to the side or under the SUP.

A personal watercraft includes a floatation member, a thrust assembly, a steering assembly, and a braking assembly. The assemblies may be actuated either mechanically or electrically. The thrust assembly is human powered, solar powered, or electric powered. The thrust, steering, and braking assemblies can be added after-market to an existing stand-up paddle board (SUP), or built into one or a plurality of SUPs during initial manufacturing. When the thrust assembly is human powered, it is leg or arm powered. When the thrust assembly is leg powered, the legs can move backward and forward in a sliding motion, up and down in a stomping fashion, or move in a loop trajectory. When the thrust assembly is arm powered, the arms can move forward/backward together or separately. The thrust assembly includes one or a plurality of paddles or flippers that are positioned to the side or under the SUP.

An oar that uses the resistance of water to turn a paddle back and forth as it rotates along a shaft thus creating propulsion for any watercraft.

An oar that uses the resistance of water to turn a paddle back and forth as it rotates along a shaft thus creating propulsion for any watercraft.

A device for linear propulsion (1) comprises a support structure (2) for carrying a payload, and one or more wave propulsion modules (3). The or each wave propulsion module (3) comprises a first individually-pivoted substantially planar blade (4) and a second individually-pivoted substantially planar blade (5). The first individually-pivoted substantially planar blade (4) is capable of producing a reactive force by self-attenuating by spring or dynamics of buoyancy means in response to an incoming fluid flow in the horizontal plane (6). The second individually-pivoted substantially planar blade (5) is capable of producing a reactive force by self-attenuating by spring or dynamics of buoyancy means in response to an incoming fluid flow in the vertical plane (7).

A device for linear propulsion (1) comprises a support structure (2) for carrying a payload, and one or more wave propulsion modules (3). The or each wave propulsion module (3) comprises a first individually-pivoted substantially planar blade (4) and a second individually-pivoted substantially planar blade (5). The first individually-pivoted substantially planar blade (4) is capable of producing a reactive force by self-attenuating by spring or dynamics of buoyancy means in response to an incoming fluid flow in the horizontal plane (6). The second individually-pivoted substantially planar blade (5) is capable of producing a reactive force by self-attenuating by spring or dynamics of buoyancy means in response to an incoming fluid flow in the vertical plane (7).

A marine thruster includes a cylinder with a front opening and a rear opening; radial baffles positioned within an interior of the cylinder to separate the interior into equally divided water chambers; pistons positioned within a corresponding one of the equally divided water chambers; and an inner-ring rotary valve engaged with the cylinder to allow for side intake of water and the separation of each of the equally divided water chambers into a dry section and a wet section by pistons; the pistons engage with a power source, the power source providing axial reciprocating motion; and the pistons push water through the equally divided water chambers.