National Geographic : 1955 Aug
© National Geographic Society T "The Dunker" Douses a Navy Aviation Cadet During Survival Training This cockpit mock-up, developed at Pensacola, Flor ida, teaches escape from aircraft ditched at sea. After sliding down its track, the dunker turns upside down under water. The cadet must free himself from safety harness and swim to the surface of the pool. Kodachromes by Luis Marden, National Geographic Staff + Breath Bubbles from the Flight Mask of a Flyer "Trapped" Under Water The Navy has found that standard oxygen equipment works under water. Pilots pinned in wreckage could breathe half an hour awaiting rescue, as demonstrated by a researcher (left). His companion wears experi mental breathing gear used in rescue work.