U.S. Army Sgt. Gordon Yeaple, a salvage diver and noncommissioned officer in charge with the 569th Engineer Dive Detachment, signals to the safety and stand-by divers that he is going down at Fort Eustis, Va., March 18, 2016. The divers use hand signals and rope-line pulls to communicate their status and needs as verbal communication is not possible during a dive. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)