Marinette Marine Corp., Marinette, Wisconsin, is awarded a $526,293,001 fixed-price incentive (firm target) modification to previously awarded contract N00024-20-C-2300 to exercise an option for detail design and construction of one Constellation class guided-missile frigate, FFG 65. Work will be performed in Marinette, Wisconsin (51%); Camden, New Jersey (17%); Chicago, Illinois (7%); Green Bay, Wisconsin (4%); Pittsburgh, Pennsylvania (3%); Hauppauge, New York (3%); Sturgeon Bay, Wisconsin (3%); Cincinnati, Ohio (3%); Kaukauna, Wisconsin (2%); Charlotte, North Carolina (2%); Bethesda, Maryland (2%); Millersville, Maryland (2%); and Atlanta, Georgia (1%), and is expected to be completed by December 2028. Fiscal 2023 shipbuilding and conversion (Navy) funds in the amount of $526,293,001 will be obligated at time of award and will not expire at the end of the current fiscal year. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.