Four bearings...

[Shkval]

Well...we are not playing Sub Command here aren't we that is a little bit unfair to poor unsuspecting merchants isn't it? Is there any cure for my sonar guy or I had to put the barrel of my Luger against his forehead and tell him "now... listen veeery carefully"? Or maybe I'm not listening correctly? How can you know when bearing is 345.7 and he says it's 346? Or there is no way to know such things?
Anyway thanks a lot guys it was very educating and now this game has a whole new meaning.

Little update, latest attempt is a clear hit at 5,2 km, tracking - while - moving, medium speed torpedo, contact fuse... you were wright Mittelwaechter speed of a target is most important element in solution.
I think I'm ready... for long range salvo attacks on convoys with LuT torpedos, invisible for radar, equipped with snorkel in late '43... maybe I even survive...