Petty Officer 3rd Class Justin Turnbough, an auxiliary machinery watchstander and electrician’s mate in the Coast Guard Cutter Polar Star’s engineer department, climbs a ladder during a watch round while underway in McMurdo Sound, Antarctica, Jan. 10, 2016. During a round, the auxiliary watchstander ensures proper working condition of machinery throughout the ship. (U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst)
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