The United States Navy does not include even one example of a submarine or destroyer tender.
I nominate the USS Enterprise.
Very capable and at the end of service life.
If a terrible accident happens we can pull the sailors and scuttle it.
Sun Dec 08, 2013 at 12:18 PM PT: I did not know that the USS Enterprise is already halfway through the scrapping process when I posted this.
Perhaps the USS Nimitz can take the duty.