Abstract: A strut leading edge extension for a marine vehicle has an upper hull, a strut, a lower hull, and a foil. The strut leading edge extension includes a device for defining an extended strut leading edge, the device being adjustable to a plurality of positions including a fully retracted position and a fully extended position. The defining device is disposed at a front portion of the strut. An actuator moves the defining means to a plurality of positions; wherein a directional dynamic stability of the marine vehicle may be controlled by the position of the defining device.

Abstract: Bottom panels of a wet well structure of a vessel are shaped to enclose the ingle strut of a smaller vessel of hybrid hydrofoil design such that the pod and foils of the hybrid hydrofoil protrude from between the bottom panels. Inflatable seals allow the wet well to be drained and the smaller vessel supported within the wet well by solid or inflatable blocks to secure the smaller vessel and for repair, reprovisioning and the like. The motive power system of the smaller vessel can also be used to provide auxiliary power for the larger vessel.

Abstract: An easily detachable storage tank for use with existing hydrofoil ships is onnected to the ship by two struts with minimal modifications to the ship. The shipboard connections are such that the ship is also usable without the storage tank. The tank may store fuel in a plurality of cells having a diaphragm separating the fuel from ballast seawater. Weapons may also be stored in the tank and fired directly from the tank.

Abstract: A watercraft combining the physical and hydrodynamic features of a catama, a hydrofoil, and a rigid sidewall air cushion vehicle that might be considered a triple hybrid (TRIBRID). The TRIBRID is intended to operate as a multi-modal vehicle in the approximate speed range of 0-100 knots. The vehicle from at rest to operational speed, obtains its lift at first from 100% buoyancy of catamaran hulls, then from dynamic lift of hydrofoils, and finally from powered aerostatic lift from a captured air cushion. A combination of two or all lift modes may be used through speed changes and at intermediate speeds.