The Boeing Co., Anaheim, Calif., is being awarded $21.3m contract modification under previously awarded contract (N00030-07-C-0002) to exercise options for TRIDENT II (D5) Navigation Subsystem.Specific efforts include:engineering support services and problem investigations for U.S. and U.K. owned Electrostatically Supported Gyro Navigator (ESGN) navigation inertial equipment, modification, refurbishment, and repair of U.S. and U.K. ESGN instruments and components, TRIDENT II (D5) shipyard overhaul field engineering, U.S. Fleet Documentation, Surveillance Program, and training.Work will be performed in Anaheim, Calif., and is expected to be completed September 2010.Contract funds will not expire at the end of the current fiscal year.This contract was awarded based on a sole source acquisition.The Navy's Strategic Systems Programs, Arlington, Va., is the contracting activity.