A watertight foldable system comprises a watertight panel in which folds have been made such that the panel may be folded from a flat state into an open-top watercraft such as for example a canoe. The panel comprises a set of folds such that the watercraft, after it has been folded into watercraft, has a bottom having a flat profile in longitudinal direction or having a convex profile relative to the watercraft.

The collapsible water vessel is deployed as either a kayak or a canoe. The collapsible water vessel is portable and is stored as or in a backpack. The collapsible water vessel deploys with a bottom configuration selected from the group consisting of a normal bottom, a deep V bottom, and a flat bottom. The collapsible water vessel comprises an outer frame, one or more ribs, one or more seats, an outer shell, a flooring bladder, and a plurality of elastic cords. The outer shell provides a barrier between the interior of the collapsible water vessel and the water within which the collapsible water vessel is placed. The outer frame, the one or more ribs, the one or more seats, the flooring bladder, and the plurality of elastic cords form the physical structure upon which the outer shell attaches.

A standup paddleboard outrigger includes a long, narrow, lightweight displacement hull and a pair of outrigger pontoons mounted to a bridge. The two parts disengage for easy storage and transport. The hull has a platform to stand on. Paddling with a long handled paddle propels the craft through the water. The outriggers provide lateral stability/support and actuate the rudder in order to make turns. When a person stands on the platform and shifts body weight, the rudder will rotate to the right and the craft will turn to the right. The more weight that is shifted, the greater the turning action. The responsiveness to the shift of body weight can be adjustable for personal preference either firmer or more flexible, as is the turning response of the rudder fine or coarse turning.

Examples are disclosed that relate to watercraft with retractable drive mechanisms. One example provides a watercraft including a hull having a receiving compartment, and also having a deck. The watercraft also includes a drive unit extending through the deck and the hull of the watercraft and being configured to receive rotational input. The drive unit includes a driveshaft and propeller moveable between an extended position in which the propeller is positioned underneath the hull and a retracted position in which the propeller is positioned at least partially within the receiving compartment.

A collapsible watercraft comprised of a single high-strength foldable panel that is creased in a predetermined pattern to form living hinges, the panel being foldable to transform from self-defined compact knocked down package, into a rigid three dimensional kayak form. Other removable rigid structural members, bulkheads, seat assembly and floorboards help maintain the shape and integrity of the shell.

A watercraft having a propulsion mechanism extending through an opening in the bottom of the watercraft having a propulsion mechanism adapted to be inserted in an opening in the bottom of a watercraft comprising a pair of pedals each coupled to a flexible fin extending below the water line, the pair of fins oscillate through an arcuate path on a horizontal axis to propel the watercraft. The horizontal axis is preferably continuously rotatable in either direction through 360 on a vertical axis disposed at a substantially right angle to the longitudinal axis of the watercraft to propel the watercraft in any direction.

A powered watercraft system including a watercraft body having a propulsion system, a foot swimfin, a sensor configured to measure a value indicative of a manually-generated time-variable first propulsive force resulting from a leg motion to the foot swimfin to move the watercraft body, and a controller configured control the propulsion system to generate a second propulsive force for powering the watercraft body based on the value indicative of the first propulsive force, the generated second propulsive force being at least partially contemporary with the first propulsive force.

A transparent modulatable kayak with shading system includes two pairs of fitting devices, reversibly connecting multiple kayaks. The tubular body of the paddle is reversibly divisible at the center. The inner volume of the hull has a container housing a cloth adapted to shade the user on the seat. The upper surface of the hull has a plurality of recesses, of which at least one pair is positioned at the bow and at least one pair is positioned at the stern, each housing a portion of the tubular body of the paddle. The tubular body includes, at each end, at least one coupling device adapted to reversibly connect at least one of the corresponding coupling devices of the cloth. The hull is made of any natural or synthetic polymer adapted to ensure the floating of the kayak and its total transparency.

A canoe and platform combination assembly includes a platform that has a top side, a bottom side, a front edge, a rear edge, a first lateral edge and a second lateral edge. A plurality of arms is attached to the platform. The arms engage canoes positioned adjacent to the first and second lateral sides such that the canoes are orientated parallel to each other. A plurality of tethers is provided. Each of the arms has one of the tethers positioned thereon. Each of the tethers is positioned around one of a plurality of braces of the canoes.

An improved kayak has a hull of thermoformed ABS plastic having a bow and a seat having a void between the bow and the seat, a top of the hull being a deck with a foam PVC block glued to a bottom face of the deck. A rotomolded polyethylene plastic insert is located in the void and joined to the hull by fasteners that pass through the insert and the deck of the hull and engage the foam PVC block within the hull, with caulking between the hull and the insert. A propulsion device is removably mounted in the rotomolded plastic insert that allows a user of the kayak to propel the kayak.