[Luno]

I've had similar issues in the fleet boats. I've shot at stationary ships at anchor, zero gyro angle, and the torps still miss, sometimes by 60 degrees, sometimes by just one.

In SH3, you could set up a firing solution on one ship, and then lock the TDC, move the scope to each target and fire off torpedoes at each target easily.

I noticed in SH4 you have to re-calculate the distance at least AND send it to the computer, or the gyro-angle will not update with the periscope movement. This is true whether the computer is tracking or not. Your last measurement has to be immediately before firing, for every target, which takes a lot of time in a tight situation.

If you don't do this, the gyro angle will be screwed up, and your torps will end up in open water.