Watercraft with a solid hull and a solid outer side, where a recess extending essentially in a horizontal plane is formed in the outer side of said watercraft above the water line, in which recess an elastically deformable safety element is permanently installed, which element is folded onto itself in a first operating state and is inflated by means of a pressurized fluid from a source of pressurized fluid in a second operating state, characterized in that at least one undercut projection is for...

An anti-capsizing watercraft for propulsion over rough water includes three flotation members radially and circumferentially spaced connected with a hub member and an occupant platform rotatably connected with said hub member whereby at least two floatation members support the craft during rolling movement in the rough water with the occupant platform maintaining a stable level orientation.

A damaged boat floatation system for providing floatation to damaged boats. The damaged boat floatation system includes a floatation assembly including air inflatable tubular members being attached end-to-end to form an endless tube being adapted to fit about sides of a boat; and also includes a compressed air container for filling the endless tube with compressed air; and further includes a carrying case for carrying the floatation assembly and the compress air container.

A watercraft, e.g. a passenger vessel, a ferry, a hazardous-substance freighter or the like, with a deck and with a buoyancy chamber in the deck, it being the case that, in a first operating state, the buoyancy chamber contains air, is characterized in that, in a second operating state, the buoyancy chamber is filled with a foam which has a high cell volume with closed cells and a dimensionally stable state of aggregation.

An emergency buoyancy system mounted to a vessel includes a depth sensor to sense a predetermined maximum depth, and an actuator actuated by the depth sensor. The actuator, upon actuation, opens a membrane between tanks, each holding one of a pair of gas producing chemicals. The gas producing chemicals, preferably bicarbonate of soda and vinegar, mix together to produce carbon dioxide. The carbon dioxide fills a plurality of balloons, thereby providing buoyancy to the vessel to which the balloon...

A combination boat and distressed boat flotation apparatus, a distressed boat flotation apparatus, and methods of installing and using a boat flotation apparatus are provided. The combination preferably includes a boat including a boat hull and a plurality of flotation containers positioned to substantially surround the boat hull and positioned to be inflated with a gas responsive to the boat hull being in a distressed condition so that the boat is prevented from sinking by the inflated pluralit...

A boat compensates for roll over conditions by maintaining a user in an upright position at all times. The boat contains an external frame, an internal frame disposed for moving within the external frame, and a seat assembly attached to the internal frame and maintained in an upright position by movement of the internal frame within the external frame. At least three buoyancy chambers are attached to the external frame.

An aquatic vessel safety device, comprised of a set of automatically inflatable water-tight inflatable flotation bladders, attached to the hull of any aquatic vessel or boat capable of being quickly inflated when the aquatic vessel is in danger of being sunk or capsized.

A system to keep any type of vessel afloat in case of entry of water, by means of providing inflatable flotation elements through the outside of the hull of the vessel, including a variety of mechanisms that are activated automatically when a water level detecting device inside the vessel detects that water has reached a maximum permitted level, which causes the opening of an electrically operated valve to allow pressurised fluid to pass in order to unfold said flotation elements. Alternatively,...

An improved sponson and rigid inflatable boats incorporating the same. The sponson includes a non-inflatable buoyant component, such as closed-cell polyethylene, and an inflatable buoyant component, such as one or more inflatable tubes. The boat includes a rigid hull having sidewalls along which one or more of the improved sponsons extend. In some embodiments, the inflatable component is removably secured to the non-inflatable component by a restraining structure. In some embodiments, the restra...