U.S. Coast Guard Petty Officer 1st Class Ashley Scott, a Health Service Technician onboard USCGC Mackinaw (WLBB 30), opens the valve on a breathing apparatus during a toxic-gas drill while underway on Lake Michigan, Nov. 26, 2022. All crew members are assigned roles before the cutter gets underway in order to safely and efficiently respond to ship-board emergencies. (U.S. Coast Guard photo by Petty Officer 3rd Class Gregory Schell)