Meet the Ghost: a fast, agile, long-range, supercavitating aircraft/boat hybrid craft that can move through an artificial underwater gaseous environment that creates 900 times less hull friction than water. The technology can be adapted to manned or unmanned applications. Its 38-foot main hull travels above the water’s surface and is propped up by two 12-feet long struts. They are attached to a 62 feet tube that contains a gas turbine engine. The struts can move like wings. When the craft is going faster than eight knots in deep waters, they rotate downward to eliminate the impact of waves.
GHOST is powered by two 2,000-horsepower engines. It can be used for anti-terrorism and other missions. Not cheap though.