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 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.

An easily assembled highly portable watercraft comprising a modular boat system that seats one or more operators and is comprised of four or more pontoons connected to downward-sloping diagonally-placed outrigger beams with attached stiffeners connecting to a bridge-deck. The portable watercraft can be rowed, poled, propelled by fins or propellers, and sailed, for example, by an operator situated on the bridge-deck. The pontoons, outriggers, bridge-deck, and other aspects are easily interchangeable to conform to numerous configurations making a custom watercraft that is tailorable to varying water conditions.

An easily assembled highly portable watercraft comprising a modular boat system that seats one or more operators and is comprised of four or more pontoons connected to downward-sloping diagonally-placed outrigger beams with attached stiffeners connecting to a bridge-deck. The portable watercraft can be rowed, poled, propelled by fins or propellers, and sailed, for example, by an operator situated on the bridge-deck. The pontoons, outriggers, bridge-deck, and other aspects are easily interchangeable to conform to numerous configurations making a custom watercraft that is tailorable to varying water conditions.

A pontoon boat includes a center frame, a port side pontoon, and a starboard side pontoon. A plurality of telescoping assemblies connect the port side pontoon and the starboard side pontoon to the center frame. The telescoping assemblies are configured such that the port side pontoon and the starboard side pontoon are displaceable relative to the center section between a retracted position and an extended position.

A pontoon boat includes a center frame, a port side pontoon, and a starboard side pontoon. A plurality of telescoping assemblies connect the port side pontoon and the starboard side pontoon to the center frame. The telescoping assemblies are configured such that the port side pontoon and the starboard side pontoon are displaceable relative to the center section between a retracted position and an extended position.

Described is a coupling device for a joining together adjacent dock segments of a dock installation including an elongate pin portion and at least one clamp portion, each positionable on respective dock segments. The pin portion has at least one elongate first clamp surface aligned along its length with a central longitudinal first axis, the pin portion being configured to be received in a corresponding pin-receiving region adjacent the clamp portion. The pin-receiving region is at least partially bordered by at least one second clamp surface which is aligned with a second axis. The clamp portion is configured to be actuated between an open pin-receiving configuration, at least partially opening the pin-receiving region along the second axis, and a pin-engaging configuration with the first clamp surface engaged with the second clamp surface. The second axis is configured to be substantially parallel with the first axis, and with a lateral axis of at least one of the dock segments, for securing the pin portion therewith, so that the pin portion is rotatable relative to the clamp portion about the first axis to accommodate relative movement between the adjacent dock segments.

A submarine support ship is preferably a triple-hulled vessel; the lower portion of the ship is a paired-hull catamaran which is capable of deep diving, clasping the submarine at deep sea, and floating upwards together with the clasped submarine. The upper portion of the ship is a buoyancy tank, which can supply air to and pull up the deep-diving lower portion, and can also conduct security of an ocean-going submarine. For the submarine support ship of the present invention, by utilizing a mature deep diving submersible technology, the lower portion of the submarine support ship is manufactured as a deep-diving submersible in a submarine contour form, which is quickly separated from the upper portion of the submarine support ship and dives to reach the submarine position in the deep sea, clasps the submarine and then floats upwards together with the submarine as a whole to the water-surface position, such that the egress hatch of the submarine is docked with a dedicated docking hatch of the submarine support ship, to implement rescue security of the submarine; which mainly solves the problem that the rescue water-depth of current deep-diving lifeboats is shallow, but it also solves the problems that the deep-diving lifeboat has many rescue links, slow speed, and can only save people, but not submarines.

An expandable pontoon boat includes a center section, a first side section, and a second side section. First and second telescoping assemblies connect the first side section to the center section, and third and fourth telescoping assemblies connect the second side section to the center section. The telescoping assemblies may be extended and retracted to extend and retract the first and second side sections from the center section, thereby widening and narrowing the boat, respectively.

An expandable pontoon boat includes a center section, a first side section, and a second side section. First and second telescoping assemblies connect the first side section to the center section, and third and fourth telescoping assemblies connect the second side section to the center section. The telescoping assemblies may be extended and retracted to extend and retract the first and second side sections from the center section, thereby widening and narrowing the boat, respectively.