Currently, the Navy's fastest submarine can only travel at 25 to 30 knots while submerged. Defense Advanced Research Projects Agency, which commissions research for the Defense Department. Electric Boat, the company contracted to design the Underwater Express mini-sub that could potentially transport high-value cargo or small groups of people as fast as 100 knots. The vehicle would travel inside a large gas bubble created in the water, a process known as supercavitation. The bubble reduces drag, since the drag is much lower in air than in water, allowing the vehicle to travel at high speeds. Now this project is enter the testing phase, Electric Boat is woking on a quarter scale model, which if successful, Electric Boat will begin production on a full scale 100-foot submarine.
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