Danure: I have the read the manual and the subsim post regarding how their sonar works. I'm glad you found a tactic that works. Please share.
For others, every time I get caught, I am in running silent mode and observing the under 100 rpm rule. I can understand if they caught me from active sonar, but they were way too far away (over 2 km).
Well, we're going to try it again. I am 100 km NE of the Azrores and just picked up contact with a nearby small convoy heading away from me. Here's the plan...
Surface at least 10 km away from the convoy and Flank it into a position ahead of them, keeping out of visual range. Submerge to 20 meters, approach from the front, silent running, under 100 rpm. Once I'm past the lead escort (if there is one and granted THE DAMN PSYCHICS don't home in on me again), flank my position to 90-degrees perpendicular with the traffic, periscope depth, shoot at least one, and down deep and quiet for the escape.
Anyone see a problem with this plan?