General Dynamics Electric Boat Corp., Groton, Conn., is being awarded a $117,816,391 modification to previously awarded contract (N00024-11-C-2109) for engineering and technical design services to support research and development of advanced submarine technologies for current and future submarine platforms. Advanced submarine research and development includes studies to support the manufacturability, maintainability, producibility, reliability, manning, survivability, hull integrity, performance, structural, weight/margin, stability, arrangements, machinery systems, acoustics, hydrodynamics, ship control, logistics, human factors, materials, weapons handling and stowage, submarine safety, and affordability. The program also supports near-term insertion of Virginia-class technology; identification of Ohio-class replacement technology options; future submarine concepts; and core technologies. Work will be performed in Groton, Conn. (75 percent), and Newport News, Va. (25 percent), and is expected to be completed by October 2013. Contract funds will not expire at the end of the fiscal year. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.