Raytheon Co., Portsmouth, Rhode Island, is awarded a $66,500,000 firm-fixed-price contract for engineering, design, development, production, integration and testing to physically upgrade 10 Llgacy AN/AQS-20A mine hunting sonars to the AN/AQS-20A Block II (AN/AQS-20C) mine hunting sonar configuration. Work will be performed in Portsmouth, Rhode Island, and is expected to be completed by August 2024. Fiscal 2021 other procurement (Navy) funds in the amount of $42,000,000 (63%); and 2020 other procurement (Navy) funds in the amount of $24,500,000 (37%) funding will be obligated at time of award and will not expire at the end of the current fiscal year. This contract was not competitively procured via the beta.SAM.gov website. The contract was awarded in accordance with 10 U.S. Code 2304(c)(1), as implemented under Federal Acquisition Regulation Part 6.302-1, only one responsible source and no other supplies or services will satisfy agency requirements. The Naval Sea Systems Command, Washington, D.C., is the contracting activity (N00024-21-C-6308).