Lockheed Martin Corp., Lockheed Martin – Rotary and Mission Systems, King of Prussia, Pennsylvania, is awarded $10,939,237 for cost-plus-fixed-fee delivery order N00019-18-F-2684 against a previously issued basic ordering agreement (N00019-15-G-0057). This delivery order provides for the management, sustainment, and upgrade of the Tactical Tomahawk Weapons Control System software product baseline and the required system and software documentation for the Navy and the government of the United Kingdom. Work will be performed in King of Prussia, Pennsylvania (98 percent); and Patuxent River, Maryland (2 percent), and is expected to be completed in January 2020. Fiscal 2019 other procurement (Navy); fiscal 2019 research, development, test and evaluation (Navy); fiscal 2019 operations and maintenance (Navy) funds; and foreign military sales funds in the amount of $10,939,237 will be obligated at time of award, $1,361,805 of which will expire at the end of the fiscal year. This order combines purchases for the Navy ($8,687,257; 79.4 percent); and the government of the United Kingdom ($2,251,980; 20.6 percent) under the Foreign Military Sales program. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.