Raytheon received a $63.4 million U.S. Navy contract for AN/AQS-22 Airborne Low Frequency Sonar, the primary undersea warfare sensor for the U.S. Navy's MH-60R multi-mission helicopter. AN/AQS-22 provides submarine detection, tracking, localization, classification, acoustic intercept, underwater communication and environmental data collection, Raytheon said. Under the contract, Raytheon will manufacture, integrate, test and deliver 15 new ALFS systems, as well as provide miscellaneous "weapons replaceable assemblies for unit under test" and air maintenance trainer assets. Work will be performed at Raytheon's Seapower Capability Center, Portsmouth, R.I., and by AN/AQS-22 partner, DRS Sonar Systems, Gaithersburg, Md. Work is expected to be completed by January 2011.