A Damage Controlman, the team leader during a General Quarters (GQ) drill, checks a compartment (a room aboard ship) for possible casualties using a hand-held thermal imager. Thermal imaging technology has dramatically improved shipboard search and rescue efforts encountered in the tight spaces aboard ship. Navy firefighters, using thermal imagers, can quickly locate and identify victims in dark, smoke-filled compartments. The Navy's primary concern is always safety. U.S. Navy photo by Photographer's Mate 3rd Class Jo Wilbourn.