One player asked about how does he know a torpedo has missed in another
post.
In the beginning when I played the game I found I could distinctly hear
the torpedoes as they passed overhead(that is, when I didn't ignore the
warning bell and keep pumping torpedoes at some poor already sinking
tanker...).
Now I've found a really neat thing to do, after you move to safe depth
after torpedo is fired, say "Spectator" or hit F5, and sit and watch the torpodoes go over your boat...you not only know they are gone, but you see from which direction they came from, bow, stern, port etc.
And the graphics are awesome.
If you haven't tried this, you will like it.
heh, when I hear the torpedo bell go off, I crash dive to 50m, then go to external to watch them go over me as well. Then I pop back up and return their thoughtful gift!