Blade counts in ship descriptions?
 

I'm surprised that the Ship Description Summary doesn't include an item for the propulsion type. Not just blades, but start there. Shroud? Dual screws? Multiple prop's, etc. Maybe as a dropdown note, very nice, once I found them. This is important and generally well known at the time. Particularly if it 'sinks' with a sonar model. I dropped a why? (sync's).

I had my first sub-sub collision. No damage, to my surprise.

Is there a dual screw Seawolf model for the '84 campaign?

https://en.wikipedia.org/wiki/USS_Seawolf_(SSN-575)

Blade-rate is one of the things glossed over by the way the sonar is done in this game. I agree it would be nice to have things like that but if added then you go down a "dangerous" course of creating a station-by-station game much like Sub Command & Dangerous Waters. While I and many others did enjoy those games I think its really the simplicity and focus on the game play and action which has made Cold Waters the success that its been by being more viable to a broader audience (people who aren't willing to spend hours learning how broad & narrow band sonar work or performing TMA to get firing solutions).

As far as Seawolf goes, I've been using the Tango model with the third screw removed, not great but probably as close as you could get. By 84 though, due to her age and despite her secret mission modifications the Seawolf isn't what you'd want to call a "front-line" boat, same would go for the Skates and to a lesser extent the Skipjacks as well.