Yea the Anicoic (I know I spelled it wrong) was a direct steal from NATO as well on the Kilo's, what's really amazing is they are still loud as fuck to Sonar People anyway something to do with the Steam Plant being designed initially for another sub class and there was something Off with the two designs being put together the way they where.
You couldn't pay me enough to get in a sub anywhere other than a dry dock too small for me and well I watched "Das Boat" and "Hunt for the red October" with my dad as a kid and learned about crush depth... yea... no....
Also listen to this about the USS Thresher -
He's a former Sonar Guy and navy consultant and he was pissed off about that they knew the sub an crew where alive an pinging, likely using the little power they had to generate a sonar ping an sitting in the dark, cold waiting for the air to run out.