Hydroid Inc., Pocasset, Massachusetts, is awarded a $74,700,000 indefinite-delivery/indefinite-quantity contract, containing firm-fixed-price provisions. This contract is for the procurement of MK 18 Mod 2 Unmanned Underwater Vehicle (UUV) Increment II Payload Upgrade hardware, in support of the existing MK 18 Mod 2 UUV program. Work will be performed in Pocasset, Massachusetts, and is expected to be completed in April 2026. Fiscal 2021 other procurement (Navy) funds in the amount of $2,112,827 will be obligated at time of award on the first delivery order and will not expire at the end of the current fiscal year. This contract was not competitively procured on the Beta.SAM.gov website, in accordance with 10 U.S. Code 2304(c)(1) (only one responsible source and no other supplies or services will satisfy agency requirements). The Naval Undersea Warfare Center Division, Newport, Newport, Rhode Island, is the contracting activity (N66604-21-D-C000).