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.
The USA Navy as of 2008 operated 99. vessels powered by nuclear reactors including 10 nuclear powered aircraft carriers and 71. submarines. It has operated nuclear powered ships for more than 50 years. As of 2001, about. 235 naval reactors had been built at a unit cost of about $100 million for a submarine and $200.