Yes I want to avoid British air patrols and I do crash-dive when I know something is coming. Unfortunately as I mentioned in the first post my WO reports spotting aircraft AFTER my U-boat is hit with something (bomb I presume) and my hull integrity goes down to 2% and I have tremendous damage and diving is out of question as it ends in not too nice "game over" kind of screen.
So to make my question clearer: Is it normal that watch crew is not able to spot air patrol or is it because of high TC?