160407-N-HG414-153 PORTLAND, Ore. (April 7, 2016) Rear Adm. Robert Girrier, director, unmanned warfare systems, offers remarks during a christening ceremony for Anti-Submarine Warfare Continuous Trail Unmanned Vessel (ACTUV) Sea Hunter, an entirely new class of unmanned ocean-going vessel during a ceremony held in Portland, Oregon. The Defense Advanced Research Projects Agency (DARPA) in conjunction with the Office of Naval Research (ONR) is working to fully test the capabilities of the vessel which is able to travel thousands of miles over the open seas for months at a time without a crew, and with a high degree of autonomy in operation. (U.S. Navy photo by Lt. Amber Lynn Daniel/Released)