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Haze Gray and Underway
http://www.hazegray.org/danfs/submar/ssn647.htm
Ship's history from the Dictionary of American Naval Fighting Ships.
Naval Vessel Registrar
http://www.nvr.navy.mil/nvrships/details/SSN647.htm
Brief fact sheet.
NavSource Online
http://www.navsource.org/archives/08/08647.htm
Pogy (SSN-647) facts and images.
SubNet
http://www.subnet.com/FLEET/ssn647.htm
USS Pogy specifications and history.