I think micky1up would be the guy to ask.
Also this is the North Sea we are talking about. Not that deep really for an SSN to operate effectively in. I'm not making excuses out of patriotism, it is always possible for a good crew in an inferior machine who try hard and play smart to beat a superior vessel even if it has a good crew.
Obviously being a diesel-electric going dead slow and almost stop would put the Kilo at the advantage, plus it would have the maneauvering advantage given its size. Also it depends on the size of the exercise area. Starting positions etc. What you are telling does show how a Kilo class sub should not be underestimated. Used as a smart mobile mine it can be deadly.
It would be interesting to find out more. I don't however think you should start changing values in the database based on this exercise until more info can be found out.
good luck though.
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