[BigBadVuk]

Well if Nimitz class is somewhere (if im right) around 1 year of authonomy then i guess subs r around that time also....

And @amrcg even if u order full stop to nuclear sub...manuvering and reactor control room will NOT turn down all the pumps and systems for cooling the reactor, becose that will be the invitation for disaster...Chernobyl II at sea...So u need to keep reactor supplied with coolant all the time even if he is not operating at 100% and CRDM(control rods drive mechanisam-set of graphite rods for controling the fission,something like throtle in plane or car) is in full down position.And even if pumps are all on rubber stands,double insulated from sub external hull they r still noisy so generaly SSNs are louder than SSs..