Air cushion ship (English: hovercraft) or floating ship is a vehicle that runs on an air cushion. The air cushion is generated by blowing air into the lower space of this ship (plenum chamber) through the skirt (flexible bulkhead) so that the air pressure in the plenum chamber is higher than the outside air pressure, resulting in a lift force.[1] To move an air cushion ship, the thrust obtained from the propeller is used as in an airplane. The lifting force of this ship works on a wide cross-section, so the pressure on the ground or water (ground pressure) generated is not large. Thus, this vehicle can run on mud, water or land with a fairly heavy load. Because there is no direct contact between the hovercraft and the land or water surface, the resistance that occurs is small so that the hovercraft can go at high speed.