There haven't been any Franklin-class subs in service for years.
http://en.wikipedia.org/wiki/USNS_Lewis_and_Clark_(T-AKE-1)
Very first link that comes up on Google. The current Lewis and Clark is the lead ship of her class of supply vessels.
From Wikipedia: The USS Lewsi and Clark was...”deactivated while still in commission on 1 October 1991” and was “decommissioned on 27 June 1992...”