Midshipmen Tyler Wickesberg (right) shines a light into a main diesel engine for Coast Guard Petty Officer 1st Class William Hawley as several members of the Coast Guard Cutter Healy perform maintenance on an engine while transiting the southern Chukchi Sea, Aug. 29, 2017.
The maintenance was addressing an o-ring that has started to leak jacket water, which happens an average of one to two times per deployment.
U.S. Coast Guard photo by Petty Officer 3rd Class Amanda Norcross