Naval History and Heritage Command

Naval History and Heritage Command

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Seawolf III (SSN-21)


Anarhichas Lupus, a fish known for its ferocious nature. The third U.S. Navy ship (all submarines) named Seawolf. The first Seawolf (SS-197) served from 1939–1945, and the second (SSN-575) from 1957–1987. Seawolf (Submarine Torpedo Boat No. 28), authorized on 3 March 1909, was renamed H-1 on 17 November 1911, two years before she was commissioned, and thus never served under the name.


(SSN-21: displacement 9,137; length 353'; beam 40'; draft 36'; speed 25 knots; complement 116; armament UGM-109 Tomahawk cruise missiles,UGM-84 Harpoon anti-ship missiles, and Mk 48 Advanced Capability torpedoes, eight torpedo tubes; class Seawolf)

The third Seawolf (SSN-21) was laid down at General Dynamics Electric Boat, Groton, Conn.; launched on 24 June 1995; sponsored by Mrs. Margaret O. Dalton, wife of Secretary of the Navy John H. Dalton; and commissioned at Naval Submarine Base New London, Conn., on 19 July 1997, Capt. David M. McCall in command.

Seawolf III (SSN-21) 1997-
Seawolf churns through the waves as she completes her initial sea trials, 5 July 1996. These evolutions include underwater submergence, acoustics trials, engineering inspections, and at sea training. (Unattributed or numbered General Dynamics Electric Boat photograph donated to the Navy, Navy NewsStand)

Seawolf shifted from the Atlantic Fleet to the Pacific Fleet when she changed her home port from Naval Submarine Base New London, Conn., to Naval Base Kitsap, Wash., from 15 June–22 July 2007.

Seawolf (SSN-21) III 1997-070722-N-4386D-002
Large harbor tug Manhattan (YTB-779) eases Seawolf toward Delta Pier and sailors heave lines and moor the boat as she arrives at Naval Base Kitsap, Wash., 22 July 2007. (Mass Communication Specialist 3rd Class Scott Dagendesh, U.S. Navy Photograph 070722-N-4386D-002, Navy NewsStand)

Detailed history under construction.

Mark L. Evans

20 July 2015

Published: Tue Sep 08 11:45:24 EDT 2015