Photo #: NH 44548
USS O-10 (SS-71)
USS O-4 (SS-65)
At the Boston Navy Yard, Massachusetts, 28 September 1922.
Note that O-4's 3"/23 gun is in the extended (operating) position, while that on O-10 is retracted.
Four-funneled ship in the right distance is the former U.S. Army Transport Mount Vernon.
U.S. Naval Historical Center Photograph.
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Image posted 7 November 2005