Hull Maintenance Technician 1st Class Amy Walters, an instructor at the Surface Warfare Engineering Schools Command Great Lakes Damage Controlman (DC) "A" School, instructs an accession-level Sailor on firefighting techniques during a live-fire training exercise at Naval Station Great Lakes, Dec. 17, 2024. Damage controlmen are technicians responsible for preventing and containing hazardous situations on ships and submarines. (U.S. Navy photo by Mass Communication Specialist 2nd Class Matt Hall)