190821-N-N0443-001 GREAT LAKES, Ill. (Aug. 21, 2019) Center for Surface Combat Systems Unit Great Lakes Operations Specialist "A" School student Seaman Lucerito Arvizu keeps unaware friendly ships updated with information on hostile contacts by utilizing external communications in the operations specialist capstone. Students are tested with realistic and adverse scenarios that they may face in their Navy career. The capstone is a final culmination of all that students have learned throughout Operations Specialist "A" School. (U.S. Navy Photo by Electronics Technician Seaman Taylor Port/Released)