I know it must have SOME defensive capability,but I will be damned if I can see any of it.
BTW,what good are these things when what they really do is tell our foes where a US submarine is operating,so that it can be followed,or sank during war time?
A submarines greatest strength is stealth. Having a supply ship floating around somewhere in the ocean in order to give them their mail and fresh orange juice ain't very "stealthy".