Disclosed herein is an inflatable watercraft barrier in one example having an inflatable perimeter tube. Also disclosed is a diaphragm sealed to the perimeter tube to form the watercraft barrier between a watercraft and the water in which the watercraft barrier and watercraft float. In one example, a portion of the perimeter tube forms a gate portion which is at least partially selectively deflated so as to be denser than water, and therefore rotates about a gate pivot such that the watercraft may enter the watercraft barrier through the gate portion. Also disclosed is a water pump in fluid communication with the watercraft barrier so as to evacuate water from between the watercraft barrier and the watercraft.

An inflatable vessel is provided, the vessel comprising an enclosed flexible membrane having an interior, a first end and a second end; and a rigid elongate member extending within the interior of the membrane and attached to the membrane at a first attachment point at the first end of the membrane and to the membrane at a second attachment point at the second end of the membrane. The vessel finds use, for example, in a floating dry dock assembly.

A collapsible transom for an inflatable raft has a front section including two parallel front struts and a rear section including a floor portion and a collapsible support portion. The floor portion includes two parallel rear struts, and the two parallel front struts and two parallel rear struts are slidably connectable to each other by insertion into tubular end portions. The support portion is pivotally connected to the floor portion and movable between an expanded position with the support portion substantially parallel to and spaced away from the floor to a collapsed position with the support portion adjacent the floor.

Disclosed is a buoyancy tube for a life raft having: a first panel including: a first panel top edge and a first panel bottom edge, the first panel top edge defines a first repeating pattern, and the first panel bottom edge defines a second repeating pattern that is a rotated version of the first panel top edge; a second panel that has a same shape as the first panel, the first and second panels connected by a first elongated seam and a second elongated seam that are non-overlapping with one another, the first and second panels, when connected, define outer an inner boundaries of the life raft, the outer boundary defines an outer polygon having outer sides and the inner boundary defines an inner polygon having inner sides such that each of the plurality of outer sides is parallel with one of the plurality of inner sides.

A UAV with vertical takeoff and landing (VTOL) function. having a plurality of lift propellers; a cabin engaged with a plurality of lift propellers; a water propulsion system engaged with the cabin to push the cabin in a forward direction when the cabin is at least partially immersed in water; at least one water inlet engaged with the water propulsion system; the cabin is a cargo hold or a passenger cabin. The UAV provided by the disclosure can realize vertical takeoff and landing in the water area, and fly, drive and navigate freely in the whole area.

A double-chambers inflatable kayak, including an upper chamber and a lower chamber which are fixedly connected to each other by a connecting portion and between which a cavity is formed, wherein the upper chamber includes a cockpit hole and a first air valve provided on the surface, the cockpit hole being in communication with the cavity, and the first air valve being used to inflate and deflate the upper chamber, and wherein the lower chamber includes a second air valve which is used to inflate and deflate the lower chamber.

A double-chambers inflatable kayak, including an upper chamber and a lower chamber which are fixedly connected to each other by a connecting portion and between which a cavity is formed, wherein the upper chamber includes a cockpit hole and a first air valve provided on the surface, the cockpit hole being in communication with the cavity, and the first air valve being used to inflate and deflate the upper chamber, and wherein the lower chamber includes a second air valve which is used to inflate and deflate the lower chamber.

The present invention provides inflatable watercraft that arc light weight, easily stowed in relatively small spaces and formed from inflatable drop stitch panels. A preferred watercraft is a boat having a bow. stem, keel and an open transom for self-bailing. A deck can be provided as a separate panel that is cither permanently, or detachably, connected to freeboard sides of the watercraft. When connected, the deck provides a sitting area, and enhances the strength and rigidity of the watercraft by functioning like a deck beam. Optional features include a bucket held in place by, and fitted through, a hole in the deck panel. Preferred inflation pressures are between 2 and 25 p.s.i.. and more preferably between 12 and 18 p.s.i.

The present invention provides inflatable watercraft that arc light weight, easily stowed in relatively small spaces and formed from inflatable drop stitch panels. A preferred watercraft is a boat having a bow. stem, keel and an open transom for self-bailing. A deck can be provided as a separate panel that is cither permanently, or detachably, connected to freeboard sides of the watercraft. When connected, the deck provides a sitting area, and enhances the strength and rigidity of the watercraft by functioning like a deck beam. Optional features include a bucket held in place by, and fitted through, a hole in the deck panel. Preferred inflation pressures are between 2 and 25 p.s.i.. and more preferably between 12 and 18 p.s.i.

The invention relates to a watercraft comprising an at least partly elastic and preferably inflatable casing (1), in particular a casing which surrounds an inner region. The watercraft has a base (2), an energy storage device (6), and a drive device which is secured to the base and comprises a drive unit (4) that is located in the water during operation, the flow of water produced by the drive unit during operation being controllable by means of a controller. The drive device is releasably secured to the base as a module comprising the energy storage device (6), which is designed as part of the module, such that the module can be removed as a structural unit.