[PappyCain]

Yes, in '39 they will give up but after that, they become very aggressive with new tactics and technology. I have had up to 9 real time hours escaping (that is a real challenge the game offers, white knuckle to be sure). I have used a 7 degree to starboard circle and to good results when an escort or two leaves it's convoy to hunt me. Then when they fade back to their herd I head in the opposite direction (rigged for silence) until I am all clear. BTW I go deep and keep a good eye on the depth gauge and activate pumps if I must. Minor hull damage is to be avoided in this gambit as you will crush sooner. Good fun and rewarding to make a clean get-away with boat intact and the crew singing and that fresh air when surfaced is cold and clean!!!