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.
Submarines are very largeâthe hull of the USS Balao (image at left, SS-324 Balao), one of the most successful U.S. submarines and a good example for the basic idea of a submarine, was 312 feet long and displaced 2,415 tons; but also very cumbersomeâUSS Balao carried 10 officers and 70 enlisted men.