The C-class submarines were five United States Navy submarines built by the Fore River Shipbuilding Company in Quincy, Massachusetts, under a subcontract from the Electric Boat Company. Built between
USS Tarpon, 1909
The United States O-class submarines were a class of sixteen coastal patrol submarines laid down for the United States Navy just before, and just after, the United States entry into World War I. The U
USS O-1, lead ship of her class, in dry dock, at Portsmouth Navy Yard, on 5 September 1918
Nine O-class submarines from Submarine Division 8, at Boston, 1921