ANNAPOLIS, MD -- The newest Overlord Unmanned Surface Vessel will transit to the West Coast to begin fleet operations and will be joined by the Navy's next prototype in 2023. While it’s termed an unmanned vessel, the Mariner medium USV currently operates with a crew of about six people and can go in and out of an autonomous mode. The Overlord program converts manned vessels into autonomous systems that can host and employ a variety of modular payloads. Mariner is...