110215ZK021-003 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.

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Photo credit: © Mil image / Alamy / Afripics
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Keywords: .., astc, aviation, center, island, nas, navy, sailors, survival, training, whidbey