All electric boat made by a company called Candela, uses hydrofoil technology to stealthily glide above the water in near silence. I can totally see some Seal team or other Special Forces unit using this tech to conduct a "sneak attack" on a sleeping enemy. The boat direct drive is shaped like a torpedo & turns with near zero noise once in hydrofoil mode. The boat stealthily glides on its skids cutting across the water in nearly silent mode, with only the water striking the small skids. Pretty cool video- Enjoy!!