<Dl> <Dd> (1980 - 1990) </Dd> </Dl> <Dd> (1980 - 1990) </Dd> <P> Blueback was decommissioned on 1 October 1990 and laid up in the Pacific Reserve Fleet in Bremerton, Washington . She was struck from the Naval Vessel Register on 30 October 1990 . With her removal from service, the last warship that was a diesel - electric submarine of the United States Navy had left the fleet, leaving the research submarine USS Dolphin (AGSS - 555) as the last diesel submarine of the US fleet . </P> <P> In February 1994 the Oregon Museum of Science and Industry (OMSI) towed Blueback to Portland, Oregon, where she now rests as an interactive part of the museum and a memorial . Her propeller was removed and installed outside the museum as a National Submarine Memorial . OMSI offers guided tours of the submarine several times a day . The vessel was added to the National Register of Historic Places in September 2008 . </P>

What was the last diesel submarine in the us navy