SAN DIEGO (April 21, 2021) Sailors track the location of the MANTAS T38 Devil Ray unmanned surface vehicle from the U.S. 3rd Fleet Joint Operations Center as part of U.S. Pacific Fleet's Unmanned Systems Integrated Battle Problem 21. UxS IBP 21 integrates manned and unmanned capabilities into operational scenarios to generate warfighting advantages. (U.S. Navy photo by Mass Communication Specialist 2nd Class Natalie M. Byers)