Belgrano, a ship which survived Pearl Harbour when the USS Phoenix, is the only vessel to have been sunk by a nuclear submarine and, I believe, the last operational ship left from WW2.
If my memory serves me well, I remember something like the USS Arizona in Hawaii (Sunk during the attack on Pearl Harbour) is according all paperworks etc still the only war ship from the WW2 era still operational. I'm sure we have fellow members from the USA who know more about it but I recall to have read that the Arizona has never been officially retired from active service and technically still is in a status of being operational.
Edit: This is what Wikipedia says:
It is commonly—albeit incorrectly—believed that Arizona remains perpetually in commission, like the USS Constitution Arizona is under the control of the National Park Service, but the U.S. Navy still retains the title. Arizona retains the right, in perpetuity, to fly the Uniterd States Flag as if she were an active, commissioned naval vessel.
So this means, if I understand things correct; Not really in service but not entirely out of commission.....
EndEdit
Henri
Edited by Henri Greuter, 21 February 2018 - 09:01.