@chopped50ford,
Your best bet is to get to 1000 yards ( approx. 1/2 mile ) from where you want to fire the torp, sit at PD and wait for the right second..............
SLOOOSH....................BLALOOEY......the end.
Never charge one like a rino as your just going to waste torps and/or you sub's gonna get hurt in the process somehow.
Now go sink something.