I have GWX. I am using the new torpedos [the ones that are black]. I fire and they just bounce off. 4 torps on a ship with no boom. is there a switch I'm supposed to hit? The one in the TDC that has I/M and that one is switched to M. Should I switch it to I? The only speed I'm allowed with the new torpedos is slow.

I had to sink all 3 of my merchant kills with deck guns. HELP!!!