D-2
(SS-18: dp. 228; 1. 134'10"; b. 13'11"; dr. 11'8"; s.
13 k.; cpl. 15; a. 4 18" tt.; cl D)
D-2 was launched as Grayling (SS-18) 16 June 1909 by Fore River Shipbuilding Co., Quincy, Mass., under subcontract from Electric Boat Co., Groton, Conn. sponsored by Miss. C. H. Bowles, and commissioned 23 November 1909, Lieutenant Owen Hill in command. She was renamed D-2 on 17 November 1911.
D-2 joined the Atlantic Torpedo Fleet as Flagboat for Submarine Division 3. Along the Atlantic coast, D-2 joined in diving, torpedo, and experimental exercises. She participated in the Presidential Review of the Fleet in North River, N.Y. from 5 to 18 May 1916.
During World War I D-2 served in training and experimental work at New London. She was placed in commission in reserve at Philadelphia Navy Yard 9 September 1919 and placed in ordinary 15 July 1921. Towed to Philadelphia Navy Yard, she was decommissioned 18 January 1922 and sold as a hulk 25 September 1922.