190821-N-N0443-003 GREAT LAKES, Ill. (Aug. 21, 2019) Center for Surface Combat Systems Unit Great Lakes Operations Specialist "A" School student Seaman Recruit Alex Martinez mans the surface tracker watch post to keep the tactical actions officer and watch supervisor updated on inbound targets during the operations specialist capstone. The capstone is a test of student's proficiency in communication, teamwork and knowledge they have gained throughout the entirety of Operations Specialist "A" School. (U.S. Navy photo by Electronics Technician Seaman Taylor Port/Released)