SAN DIEGO (April 17, 2021) Petty Officer 3rd Class Casey Trietsch receives a tour and demonstration from Bruce Hanson aboard the MANTAS T38 Devil Ray unmanned surface vehicle. 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)