<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> 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>
what was the last diesel submarine in the us navy
what was the last diesel submarine in the us navy
the research submarine USS Dolphin ( AGSS - 555 )
the research submarine USS Dolphin ( AGSS - 555 )