This is great! Just what a relative fresh wanabee sub commander like me needs. Simply brilliant. I'll have to get myself to be able to do a manual TDC one day and this will help a lot.

One question though. 'Normally' I just fire one torpedo at a boat, try to aim for the weakest spot using that colour ESB version and a big boat like that will then stop in it's tracks but take forever to go down.

In this video that poor captain got 4 of them fired at his boat (and they hit too ...) but that seemed rather excessive force. What is a good policy when trying to sink a boat that size? Shoot one and hope for the best? Or take more torps but spend a rather long time reloading tubes and that way maybe miss out on a couple of targets in a convoy for example because they simply passed you by without you being able to do anything about it.