The General Dynamics Advanced Information Systems (GDAIS), Pittsfield, Mass., is being awarded a $52,253,352 modification (#P00013) under previously awarded contract (N00030-08-C-0041) for FY09-FY11 U.S. and U.K. TRIDENT II (D5) fire control system (FCS) and the U.S. SSGN attack weapon control system (AWCS) support. These efforts include: US/UK weapon control systems (WCS) and weapon control training system (WCTS) operational support, US/UK WCS operational support, US/UK WCS and navigation system repair and return (R&R), FCS software 344 (Mk 6 life extension (LE) development, US/UK Mk 98 Mod 8/9 FCS development, engineered refueling overhaul service, Mk 98 Mod 4, 5, 6 and 7 FCS updates, AWCS training unique, and strategic weapon system training unique.