180803-N-GO855-0237 SAN DIEGO Aug. 3, 2018) Lt. Cmdr. Chaase Gruszewski, with the Office of Naval Research, prepares an autonomous underwater vehicle for the quarter finals of the 21st annual RoboSub competition, an international robotics competition held at Space and Naval Warfare Systems Center 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)