How many torpedos?

[SteveUK]

Hi all just returned from my most succesful partol to date 5 merchies totaling just under 32,000 tons (yeah amatur I know!) and had some nice targets on the way back to port but was out of fish by then.

Because its early war and the problems with the mark 14's I have been firing 3 to 4 fish at each target. Is this overkill do you think?

Whats the best number to fire at targets, I'm guessig 2 for smaller ships, 3 for mediums etc.

Any help or advice from the community would be appriciated

Thanks

Steve