Hybrid SES/hovercraft with retractable skirt system

摘要

A hybrid craft can operate as a high speed SES in open water and deploy a retracted flexible skirt to operate as a hovercraft across beaches and overland. A downwardly extending boundary structure on a hull periphery reaches through the surface of water. The boundary structure has thin rigid side-walls extending downward from lateral sides, a forward seal wall extending downward from a forward portion, and an aft seal wall extending downward from an aft portion. Machinery creates a pressurized air cushion under the hull inside of the boundary structure to support and transport the hull. A flexible skirt system on said hull inwardly of and adjacent to the boundary structure can be retracted to a first position above the boundary structure and the water and extended to a second position below the boundary structure and the surface of the water to transit beaches and overland on the air cushion.