Chief Petty Officer Brandon Cornelison (right) demonstrates the proper use of a metal file to make modifications on a fuel valve handle to Seaman Kyle Upton during maintenance for the Coast Guard Cutter Naushon (WPB 1311) in dry dock at Coast Guard Base Ketchikan, Alaska, April 20, 2017. Cutter Naushon and its crew are scheduled to complete dry dock this October. U.S. Coast Guard photo.