Simulation training has been an integral part of the military services for many years. Here, the X9D1 Trainer, nicknamed "Dumbo the Dunker", submerges with Marines on board to simulate a helicopter ditching at sea at the Marine Corps Base, Cam
Categories: U.S. Marine Corps Vintage Photographs | Art
 
 
Thank you to the Mario Family Foundation for enabling the digitization of the U.S. Naval Institute’s Photo Archive. The physical photos in the Photo Archive are stored in the Mildred M. Mario Photo Archive Room located at the U.S. Naval Institute’s Headquarters in Annapolis, MD.

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