Iran calls s woman in a  burka with a snorkel and fins a "submarine." On yeahs its armed too she has a hand grenade...seriously...yes they bought stuff for Moscow-no they cant make it work-no they cant get parts-NO THEY CAN'T THREATEN THE USN!

 

Flyingarty

I'm not sure there's any rogue nation with "quiet diesel subs".  Certainly Iran and their three boats are not a big concern.

 

ASW is a numbers game.  It's not one particular platform but rather large numbers of sensors carried and deployed by various ships, aircraft, etc.  Certainly losing the S-3 was a net loss in capability but has the battle group lost or gained total capability given the total number of systems used to support it?  If a battle group is assigned an extra SSN in support how many S-3's is that worth?  Frankly the S-3's were providing a lot more capability than ASW and some of that has been less easily replaced.

 

Quiet also commonly assumes nobody is going to use active sonar.  ASW isn't one dimensional.  Quiet is relative.  An SSN able to quickly change position can be more quiet relative to the hunters than a diesel. 

 

 

Although the threat of some noisy old Kilo laying on the bottom waiting for the Vinson Battle Group to come thru seems preposterous, anyone who has seen ASW up close knows that is a tactic that CAN work. CAN, as in, “Train like you fight, fight like you train”.