Applied Physical Sciences Corp., Groton, Connecticut, has been awarded a $16,694,977 modification (P00009) to a cost-plus-fixed-fee contract for Phase 3B of a research project for undersea sensing systems. The modification brings the total cumulative face value of the contract to $45,428,932 from $28,733,955. Work will be performed in Groton, Connecticut (91%); Orange, California (5%); and Woburn, Massachusetts (4%), with an expected completion date of October 2023. Fiscal 2022 research, development, test, and engineering funds in the amount of $16,694,977 are being obligated at time of modification award. This contract was a competitive acquisition in accordance with original broad agency announcement HR001117S0034. The Defense Advanced Research Projects Agency, Arlington, Virginia, is the contracting activity (HR001120C00100).