SAN DIEGO (April 21, 2021) System technicians perform a safety test on a MANTAS T38 Devil Ray unmanned surface vehicle (USV) in San Diego Bay for an operational test run during U.S. Pacific Fleet�s Unmanned Systems Integrated Battle Problem (UxS IBP) 21. UxS IBP 21 integrates manned and unmanned capabilities into challenging operational scenarios to generate warfighting advantages. (U.S. Navy photo by Mass Communication Specialist 2nd Class Alex Perlman)