USS Blueback - SS-581
International Call Sign: November-Kilo-Foxtrot-Sierra
USS Blueback (SS-581) is a decommissioned Barbel-class submarine formerly in the United States Navy. She was the second Navy submarine to bear the name.
Blueback was laid down by Ingalls Shipbuilding Corporation of Pascagoula, Mississippi on 15 April 1957. She was launched on 16 May 1959 sponsored by Mrs. Kenmore McManes, wife of Rear Admiral McManes,[clarification needed] and commissioned on 15 October 1959, Lieutenant Commander Robert H. Gautier in command. She was the last non-nuclear submarine to join the United States Navy and was the final conventionally powered combat capable submarine to be decommissioned, leaving the United States Navy with a fully nuclear submarine fleet except for the research submarine USS Dolphin (AGSS-555).