110215-N-ZK021-003 OAK HARBOR, Wash. (Feb. 15, 2011) Sailors prepare to be submerged in a modular egress training system during a simulated helicopter crash at the Aviation Survival Training Center at Naval Air Station Whidbey Island. This two-day refresher course is mandatory every four years for anyone who flies in Navy and Marine Corps aircraft. ( Navy photo by Mass Communication Specialist 2nd Class Nardel Gervacio/Released) US Navy 110215-N-ZK021-003 Sailors prepare to be submerged in a modular egress training system during a simulated helicopter crash at the Aviation

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Photo credit: © PJF Military Collection / Alamy / Afripics
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Keywords: .., armed, astc, aviation, center, conflict, forces, island, military, nas, navy, sailors, states, survival, training, united, war, whidbey