180208-N-BN978-001 GREAT LAKES, Ill. (Feb. 8, 2018) Electricians Mate 2nd Class Benjamin Achembach takes his final practical test on degaussing system in Surface Ship Electronics Advanced Maintenance Course "C" School at Surface Warfare Officer School Unit Great Lakes. It is the job of the studentto troubleshoot an imputted issue within a 30-minute time period. (U.S. Navy photo by Brian Walsh/Released)