SSN-24 Already Named

From the sixteenth episode of the sixth season of The Simpsons - The Fox network (February 19, 1995):

Homer Simpson: Are we going to be landing on an aircraft carrier?
G
Pilot: ....No, the nearest Navy vessel is the USS Walter Mondale... It's a laundry ship.
.....................................................................................

What is a submarine laundry ship? No results found for submarine laundry ship.
G
Juan Caruso answers...
(Submarines are always silent and strange).