Systems and methods for righting a capsized watercraft are described. The system may include a selectively inflatable bladder inside a canvas gunwale float that can be releasably attached to one side of a boat. When the other side of the boat is lifted, the float keeps at least a portion of the lowermost gunwale above the surface of the water, thereby impeding the unwanted entry of water into the boat during righting. The inflatable bladder is sized in volume according to the size and shape of the boat. The system may include one or more floats spaced apart along the side. In another aspect, one of the floats may be attached to a paddle to create a temporary outrigger for use in climbing out of the water and into the boat.

According to the present invention, there is provided a ship having an anti-sinking and anti-capsize device for emergency, which, in an emergency situation that may be caused by load or loss of buoyancy attributable to flooding, can continuously maintain the state of floating on the water by generating buoyancy inside and below a lower hull, and can prevent the ship from being tilted to one side or being completely capsized by maintaining the balance of the ship, thereby preventing a deadly accident that may occur in an emergency, such as a ship sinking accident, and also facilitating rescue operations.

A device includes at least one float. The at least one float is configured to provide a buoyancy force away from a seabed when placed in water. The device also includes an enclosure configured to house the at least one float. The enclosure comprises at least one connection configured to couple the enclosure to a self-elevating unit used in offshore oil operations or offshore gas operations.

Systems and methods for righting a capsized watercraft are described. The system may include a selectively inflatable bladder inside a canvas gunwale float that can be releasably attached to one side of a boat. When the other side of the boat is lifted, the float keeps at least a portion of the lowermost gunwale above the surface of the water, thereby impeding the unwanted entry of water into the boat during righting. The inflatable bladder is sized in volume according to the size and shape of the boat. The system may include one or more floats spaced apart along the side. In another aspect, one of the floats may be attached to a paddle to create a temporary outrigger for use in climbing out of the water and into the boat.

According to the present invention, there is provided a ship having an anti-sinking and anti-capsize device for emergency, which, in an emergency situation that may be caused by load or loss of buoyancy attributable to flooding, can continuously maintain the state of floating on the water by generating buoyancy inside and below a lower hull, and can prevent the ship from being tilted to one side or being completely capsized by maintaining the balance of the ship, thereby preventing a deadly accident that may occur in an emergency, such as a ship sinking accident, and also facilitating rescue operations.

Outboard stabilizing members (110, 210, 310, 410) include a foam core (120, 220, 320, 420) and a bladder (134, 234, 334, 434) configured to be inflated to a design pressure and configured to cover at least a portion of the associated foam core. The bladders are configured to be non-compressive to the foam core. A plurality of joining members (135, 235, 335, 435) connect an inner wall of the bladder with an outer wall of the bladder, such that when the bladder is inflated to the design pressure the outer wall and joining members prevent the inner wall from compressing the foam core. The joining members are preferably inelastic, and may be one-dimensional linear members such as strings or rods, two-dimensional panels, or other webbing.

Provided is an amphibious vehicle capable of maintaining stable vehicle posture by pitching control during cruising on water and also reducing wave drag caused by waves on water. The amphibious vehicle according to the present invention is characterized by being provided with: a vehicle body (11) capable of moving on sea and land; a front flap (14A) with one end portion secured to a lower end portion of the vehicle body (11) in such a manner that a principal surface is inclined with respect to a front surface (11a) of the vehicle body (11); and a rear flap (14B) with one end portion secured to a lower end portion of a rear surface (11b) of the vehicle body (11).

A flat-bottom fluvial transport boat comprising inflatable buoyancy tanks consisting of at least one pair of port side and starboard inflatable volumes. The paired inflatable volumes are connected to each other by means of one or more pressure balancing means.

Outboard stabilizing members (110, 210, 310, 410) include a foam core (120, 220, 320, 420) and a bladder (134, 234, 334, 434) configured to be inflated to a design pressure and configured to cover at least a portion of the associated foam core. The bladders are configured to be non-compressive to the foam core. A plurality of joining members (135, 235, 335, 435) connect an inner wall of the bladder with an outer wall of the bladder, such that when the bladder is inflated to the design pressure the outer wall and joining members prevent the inner wall from compressing the foam core. The joining members are preferably inelastic, and may be one-dimensional linear members such as strings or rods, two-dimensional panels, or other webbing.

A watercraft configured for use in a body of water is provided including a deck and at least one propulsion mechanism mounted at a first end of the deck. The at least one propulsion mechanism is configured to move the watercraft within the body of water. A man lift movable between a lowered position and a raised position is mounted to the deck. The man lift is configured to raise a person a vertical distance above the deck. Mounting brackets are arranged adjacent a first and second side of the deck. The mounting brackets are translatable between a retracted position and a deployed position. In the deployed position, the mounting brackets extend perpendicularly from the first side and the second side, respectively. An inflatable pontoon is removably coupled to each of the mounting brackets.