SAN DIEGO (April 17, 2021) Chris Valdez signals during a pre-underway systems check aboard the MANTAS T38 Devil Ray unmanned surface vehicle at an operations demonstration. U.S. Pacific Fleet�s UxS IBP 21, April 19-26, integrates manned and unmanned capabilities into the most challenging operational scenarios to generate warfighting advantages. (U.S. Navy photo by Senior Chief Mass Communication Specialist Mike Jones)