Fireman Corin Gilbert, a member of the Coast Guard Cutter Polar Star’s main propulsion division, checks a lube oil level in the cutter’s engine room while underway in McMurdo Sound, Antarctica, Jan. 10, 2016. Gilbert inspects oil levels, temperature and pressure on main machinery parts every hour as a security watchstander. (U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst)
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