The Navy will have seven unmanned surface vessel prototypes delivered and in heavy rotation by 2023, according to a service official. Two more Overlord unmanned surface vessel prototypes will be delivered next year, said Capt. Pete Small, program manager of unmanned maritime systems. The first two Overlord vessels, Nomad and Ranger, will transition from the Office of the Secretary of Defense to the Navy at the end of the year, Small said as a guest on the Aug. 29 Midrats...