Petty Officer 3rd Class Amber Brewer, an aviation maintenance technician, completes anti-corrosion maintenance on a newly refurbished MH-65 Dolphin helicopter from Aviation Logistics Center Elizabeth City, N.C., in the hangar at Sector Field Office Port Angeles, Wash., Feb. 23, 2017. Preventive maintenance on the helicopters is a big part of the day-to-day structure at every helicopter unit in the Coast Guard. U.S. Coast Guard photo courtesy of Sector Field Office Port Angeles.