A watercraft includes at least one floating member, a central frame supported thereon, first and second foot platforms, and first and second handlebars. The first and second handlebars define elongated configurations and include grasping end portions, intermediate portions pivotably coupled to the central frame, and base end portions pivotably coupled to first end portions of the respective first and second foot platforms. A propulsion system includes an axle assembly, first and second rotating arms, and first and second oars. The rotating arms are fixed relative to one another, pivotably coupled about the axle assembly at first ends, and pivotably coupled to second end portions of the foot platforms at second ends. The oars are engaged with and extend from the foot platforms. The propulsion system cycles the oars approximately 180 degrees out of phase to propel the watercraft while maintaining substantially perpendicular orientation of the oars.

A watercraft includes at least one floating member, a central frame supported thereon, first and second foot platforms, and first and second handlebars. The first and second handlebars define elongated configurations and include grasping end portions, intermediate portions pivotably coupled to the central frame, and base end portions pivotably coupled to first end portions of the respective first and second foot platforms. A propulsion system includes an axle assembly, first and second rotating arms, and first and second oars. The rotating arms are fixed relative to one another, pivotably coupled about the axle assembly at first ends, and pivotably coupled to second end portions of the foot platforms at second ends. The oars are engaged with and extend from the foot platforms. The propulsion system cycles the oars approximately 180 degrees out of phase to propel the watercraft while maintaining substantially perpendicular orientation of the oars.

A training device having a platform for receiving at least one person; at least one anchoring point for fastening a securing means that secures the person on the training device; a vertical rotation axis Z, about which the training device can be mounted rotatably or is mounted rotatably. The anchoring point is arranged at or above the height of the buttocks region of the person, and the training device is rotatable about this rotary axis Z by means of forces acting on the platform.

A shallow draft sampling raft including a bow, and a stern, in which the bow is an opposite end of the raft from the stern. The raft also includes a top surface, a bottom surface, and a plurality of longitudinal stringers. The plurality of longitudinal stringers are attached to an inner face the bottom surface and run from the bow to the stern. A top surface is also attached to the longitudinal stringers.

A shallow draft sampling raft including a bow, and a stern, in which the bow is an opposite end of the raft from the stern. The raft also includes a top surface, a bottom surface, and a plurality of longitudinal stringers. The plurality of longitudinal stringers are attached to an inner face the bottom surface and run from the bow to the stern. A top surface is also attached to the longitudinal stringers.

A watercraft includes a hull, an opening extending vertically through the hull, and a support assembly configured to mount a propulsion mechanism to the watercraft. The hull at least partially defines the opening. The support assembly includes a rightward support device attached to the hull, positioned between a forward portion of the opening and a rearward portion of the opening, and at least partially defining a right lateral portion of the opening. The support assembly further includes a leftward support device attached to the hull, positioned between the forward portion of the opening and the rearward portion of the opening, and at least partially defining a left lateral portion of the opening.

Disclosed embodiments provide an apparatus having a submersible seating surface attached to a watercraft. The submersible seating surface may be raised to serve as a table when not in use as a seat. A tension member provides upward force on the seat, allowing it to be easily raised from a lowered position to a raised position. In some embodiments, a tether is used to provide additional security for the apparatus. In embodiments, a hydrofoil cup holder is affixed to the seat to provide additional lift when a watercraft is moving forward, urging the seat upward and out of the water. The hydrofoil cup holder further includes an opening in a top surface of the cup holder to secure an item such as a beverage container. Embodiments may further include a submerged safety indicator to alert nearby swimmers and/or people on the watercraft of the submerged seat.

An apparatus configured to extend onto and retract from a body of water a flotation mat. The apparatus includes first and second spaced apart support members such that both support members include an upper and a lower end. The spaced apart support members are secured to a boat dock by mounting hardware. First and second vertically slidable members are slidably mounted to the first and second spaced apart support members. The apparatus also includes a rotatable shaft that extends between the upper ends of the first and second slidable members. A sprocket assembly is mounted to one of the ends of the rotatable shaft to facilitate either manual or powered rotation of the shaft for purposes of extending or retracting the mat onto or off the body of water.

An apparatus configured to extend onto and retract from a body of water a flotation mat. The apparatus includes first and second spaced apart support members such that both support members include an upper and a lower end. The spaced apart support members are secured to a boat dock by mounting hardware. First and second vertically slidable members are slidably mounted to the first and second spaced apart support members. The apparatus also includes a rotatable shaft that extends between the upper ends of the first and second slidable members. A sprocket assembly is mounted to one of the ends of the rotatable shaft to facilitate either manual or powered rotation of the shaft for purposes of extending or retracting the mat onto or off the body of water.

In one example, a watercraft includes a hull that defines a well extending through a bottom of the hull, a pedal-drive mechanism connected to the hull, and the pedal-drive mechanism is movable, while connected to the hull, out of the well from a deployed position to a stowed position, and a mechanism that is configured to cover a portion of the well when the pedal-drive mechanism is in the deployed position.