[Niedowidek]

Well, I'm using external camera to check if my torpedo solution was accurate. With full manual targeting (with Hitman GUI), no map updates and no event camera I wouldn't have any means to judge if I have even shot in general direction of a target ;-) (Inter alia I have newbie tendency to mistake port- and star-board side or green/red semicircle when setting torpedovorhalterechner). I don't use external camera to watch destroyers or to help locate the target.

I assumed that I can use external camera to watch incoming torpedoes as a part of my training. Later, when I'm sure that I can compute right torpedo solution, I'll stop using external camera for tracking my torpedoes.

Now it helps a lot, especially when I have duds or when I set incorrect depth for torpedo. At least I see that my solution was correct (for example: torpedo coming below the ship but not exploding).

IIRC real captains had to make 66 training attacks on surface and the same number submerged, at least when trained before war. I didn't have patience to spend so much time in training mission in game ;-)