General Dynamics National Steel and Shipbuilding Co., San Diego, California, is awarded a $736,160,588 modification to previously-awarded contract N00024-16-C-2229 to exercise the option for the detail design and construction of T-AO 213. Work will be performed in San Diego, California (58%); Iron Mountain, Michigan (8%); Crozet, Virginia (5%); Beloit, Wisconsin (4%); Mexicali, Mexico (4%); Chula Vista, California (2%); Chesapeake, Virginia (2%); National City, California (1%); Pittsburgh, Pennsylvania (1%); Walpole, Massachusetts (1%); and various other locations less than one percent (14%), and is expected to be completed by March 2028. Fiscal 2023 shipbuilding and conversion (Navy) funds in the amount of $736,160,588 (100%) 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. (Awarded May 19, 2023)