Without going into any detail, I can assure one and all that these two boats barely made it out of Polyarny before they were picked up.
As far as the ASW community having something to do? Well the Chinese have been building diesel boats for several years now, the Russians are not too much concern. When a diesel boat goes quiet it's like a hole in the ocean, you will NEVER find them until they light the torch again....Diesel boats are scary shit to an ASW spook....trust me!