The SCCA Pro Racing World Challenge and Continental Tire Sports Car Challenge racing series, run by the Sports Car Club of America, and the International Motor Sports Association, respectively, utilize modified production-based cars, sports cars, and touring cars, similar in spirit to the original Trans-Am racers.
Submarines, Inc. & Associated Firms. U.S. Submarines, Inc. founded in 1993. The company developed the concept of. the personal luxury submarine and has also designed deep submersibles for. marine science research, diesel electric submarines, tourist submarines with both. steel and transparent acrylic pressure hulls; military patrol and surveillance.
They also invented torpedoes which were propelled by small electric motors, thereby introducing one of the most dangerous weapons in the world. Submarines are also called U-boats, which is short for Unterseeboot, the German word for undersea boat. The first nuclear-powered submarine, the USS Nautilus (SN-571), was launched in 1955.