Coast Guard Petty Officer 2nd Class Elizabeth Coenen walks Coast Guard Fireman Candida Imhoff through how to reset the lift pumps for the main diesel engines aboard the Coast Guard Cutter Healy while underway in the Arctic, Friday, Sept. 8, 2017.
Imhoff was in training under Coenen, who was on underway engineering duty as the technician of the watch.
U.S. Coast Guard photo by Petty Officer 3rd Class Amanda Norcross