Serco Inc., Herndon, Virginia, is awarded a $15,788,396 cost-plus-fixed-fee modification to previously-awarded, indefinite-delivery/indefinite-quantity contract N61331-18-D-0007 to exercise options for the development, integration, testing, and evaluation of prototype systems into existing or emerging unmanned vehicles, unmanned weapons, and unmanned weapons control systems related to mine warfare, amphibious warfare, surface warfare, diving and life support, coastal and underwater intelligence, surveillance and reconnaissance, and other missions in the littoral and riverine environments. Work will be performed at locations which will be determined with each delivery order and is expected to be completed by March 2023. No funding will be obligated at time of award. Naval Surface Warfare Center Panama City Division, Panama City, Florida, is the contracting activity.