No I don't just fire a single salvo.
Mind you, to me the game is about taking down as much tonnage as possible in a realistic way. But you only got four bow torpedoes and when I intercept a convoy, I just pick out two fat targets per attack, they both get two eals. Then I back away and reload, and go back.
The choice of three speeds on the T I makes the timing issue a lot easier for me. (plus, I get the sense that the T I's are more reliable, but that just might be me)
And halfway through '42 or something like that, the destroyers seem to be pretty good at homing in on my firing position anyway, so using TI's or TII's doesn't really make that much of a difference in my game. But that could also be a fault of my own. Maybe I'm not stealthy enough. However, I almost always can get rid of them.
So maybe it's kinda personal, but I like my T I's
