180804-N-GO855-0133 SAN DIEGO (Aug. 4, 2018) Steven Murphy, with Space and Naval Warfare Systems Center Pacific (SSC Pacific), recovers an autonomous underwater vehicle during the semifinals of the 21st annual RoboSub competition, an international robotics competition held at SSC Pacific's six-million gallon transducer evaluation center in San Diego. (U.S. Navy photo by Mass Communication Specialist 1st Class Charles E. White/Released)