There is provided an assembleable boat made of fiber-reinforced plastic (FRP) including a bottom wall assembly; a left side wall assembly; a right side wall assembly; and a front wall assembly. the bottom wall assembly, the back wall assembly, the left side wall assembly, the right wall assembly, and the front wall assembly are mechanically connected to form the assembleable boat; and each of the bottom wall assembly, the left side wall assembly, the right wall assembly, and the front wall assembly is made of FRP.

There is provided an assembleable aquaboard made of fiber-reinforced plastic (FRP), including: a first plate having a first T-shaped slot on the top surface and a second T-shaped slot on the right side surface, a second plate having a third T-shaped slot on the top surface and a fourth T-shaped slot on the right side surface; a third plate having a fifth T-shaped slot on the top surface, a sixth T-shaped slot on the right side surface; a fourth plate having a seventh T-shaped slot on the top surface and an eighth T-shaped slot on the left side surface; a first T-shaped connector to connect the first and the third plates; a second T-shaped to connect the second and the fourth plates; and a first I-beam connector to connect the first plate, the second, the third plate and the fourth plate to form the assembleable aquaboard.

The present disclosure relates to drifters that float and take measurements at, or very near, a surface of a body of water. The drifters may have a design that reduces wind force effects but does not diminish Stokes drift force effects. The drifters may have two opposing exterior surfaces with antennas and sensors on each of the opposing surfaces so that the drifters may always utilize at least some of the antennas and sensors, regardless of the drifter's orientation in the water.

A boat with a foam material filled keel structure comprising: a buoyant body, which is a U-shaped tube; a bottom plate, set on the bottom of the buoyant body; a tail plate, set at the rear of the buoyant body and the bottom plate; and a keel structure, set on the bottom of the bottom plate; wherein the keel structure is downward depressed, hence a convex part on the bottom and a groove on the top are formed; wherein in the groove of the keel structure is filled with foam material, Thereby it is achieved that water seepage in the keel structure is avoided.

The instant invention is a deck barge or other vessel formed using a core of styrofoam members stiffened by fiberglass cladding with said styrofoam/fiberglass core being partially clad in concrete, which concrete is reinforced with L or U shaped rebar over/around corners and which concrete is also sheathed on its exterior and interior sides by fiberglass matting that is concrete saturated during the process in order to produce a simple, easily manufactured design that is unsinkable, inexpensive, and carries substantial weight for its size. In the preferred embodiments, the concrete cladding entirely covers the port and starboard sides as well as the top/deck of the vessel and portions of the bottom.

A shape memory alloy composite fabric and a method of use is provided in underwater pressure vessels and as flexible joints in atmospheric diving suits. The atmospheric diving suit internal pressure is one atmosphere for underwater transit to and from an underwater work site. During operations at a work site, the shape memory alloy joints transform to a martensite phase and enable greater flexibility while the pressure in the atmospheric diving suit equalizes with ambient depth pressure.

The present invention concerns a modular water drone (10) able to perform a series of missions, even simultaneously, in any aquatic environment whatsoever, which comprises a stern module (11a), a main module (11), a bow module (12) and at least one intermediate module (13), which can be divided and connected to each other, wherein each intermediate module (13) comprises an intermediate operating unit (17) configured to perform the specific mission for which it was designed in the aquatic environment and/or in its neighboring zones.

The present invention is method of reducing the longitudinal beam of a kayak in the area of a kayaker's paddle stroke by incorporating a cutaway section. The invention allows the paddle to be closer to the center of gravity of the kayak and thus produce more drive force and less wasted turning force. The paddler doesn't have to reach out so far to the side and therefore has a more comfortable and ergonomic stroke.

Embodiments described herein provide a collapsible high-performance multi-hulled watercraft which may be easily assembled/disassembled and comprised of a plurality of symmetrically shaped planar hulls which are laterally spaced and provide a shallow water draft; a deck platform releasably attached and overlying the plurality of symmetrically shaped planar hulls having at least one seat, marine radar, translucent protective shield and skid plate; and at least one propulsion unit which may releasably attached to the platform and which extends below the water line to enable high performance stability and maneuverability to the vessel.

In a method for producing a hull wall of a fiber composite sandwich component, shaped bodies of extruded polystyrene hard foam are enveloped with an envelope of fiber composite material with fibers oriented at least bidirectionally. The enveloped shaped bodies have a shape for forming a hull wall and are placed next to each other in a vacuum injection structure on a lower cover layer of fiber composite material. An upper cover layer of fiber composite material is placed on top of the enveloped shaped bodies and the vacuum injection structure is sealed. Matrix material is introduced and distributed in the vacuum injection structure until the fiber composite material of the envelopes and of the upper and lower cover layers is impregnated completely with the matrix material. The matrix material is cured and the fiber composite sandwich component of the hull wall is removed from the vacuum injection structure.