80-G-7166:  Diving School, Washington Navy Yard, Washington, D.C., May 5, 1942.  The personnel are in-front of the Presidential yacht USS Potomac (AG-25), used by President Franklin D. Roosevelt from 1936 until his death in 1945.  U.S. Navy Photograph, now in the collections of the National Archives.  (2016/06/14).
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