The Navy wants to begin initial concept design efforts and an analysis of alternatives in fiscal year 2019 for a new unmanned surface vehicle that has already seen preliminary success at the Defense Department's preeminent research agency. The medium displacement unmanned surface vehicle (MDUSV) is a continuation of the Defense Advanced Research Projects Agency's anti-submarine warfare "continuous trail" unmanned vessel, also called Sea Hunter. DARPA's program for the vessel, which would focus on tracking diesel electric submarines, transitioned to the...