Members of the Coast Guard Cutter Alert damage control team, practice moving through the main space engine room of the cutter during a fire drill, Feb. 15, 2019.
The on-scene-leader uses a hand-held electronic device to detect burning embers and hotspots, even through smoke, which need to be extinguished completely for risk of re-igniting a blaze.
U.S. Coast Guard photo by Petty Officer 3rd Class Trevor Lilburn.