Petty Officer 3rd Class John Crow, an aviation survival technician at Coast Guard Air Station Elizabeth City, N.C., deployed to Alaska for Arctic Shield 2015, sits on a piece of sea ice in the Arctic Ocean after approaching a simulated person in the water during a joint civil and federal search and rescue exercise near Oliktok Point, Alaska, July 14, 2015. Crow deployed to simulate the rescue of a thermal dummy designed by the Coast Guard Research and Development Center that gives off the heat signature of a person in the water. (U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst)