Coast Guard Petty Officer 2nd Class Jeffrey Bernard checks the lube oil level on a turbo during an engineering round aboard the Coast Guard Cutter Healy while the crew is underway in the Arctic, Saturday, Sept. 2, 2017.
The turbo is used to provide compressed air for one of the main diesel engines onboard.
U.S. Coast Guard photo by Petty Officer 3rd Class Amanda Norcross