Based solely on the conversation in this thread, and borrowing Amizaur's logic for use on what I know about technology from that period, I'd say the Alfa made 42 kts @ 400m test, with limited sonar capability that was further reduced by interference from its own noise (this I've heard elsewhere), specifically along the low narrow bands used to detect submarines at any distance. The liquid metal reactor was unreliable and particularly noisy, especially in combination with the titanium hull (this I've heard elsewhere).
I'd imagine the American submariniers could track Alfas for days without being detected and then engage them in excercises when they were ready to break contact, or slip away.
Kapitain, perhaps the reason the Americans weren't subtle about engaging the Alfa's was because they wouldn't have been heard otherwise? :hmm:
