Petty Officer 3rd Class Caleb Smith, a machinery technician aboard the Coast Guard Cutter Healy, takes pressure readings from the icebreaker's Number One engine while underway in Alaska, Aug. 25, 2014. Machinery technicians aboard the Healy maintain the vessel's four massive diesel engines. (U.S. Coast Guard photo by Petty Officer 1st Class Shawn Eggert.)
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