Currently on the Torpedo exam. I don't use the manual method, I target via parascope, lock on (which I don't think is necessary) and fire.
I've hit multiple ships and have sank enough to pass "satisfactory".
Is the orientation of the sub important? Currently I am dead in the water and would think that forward movement with parascope up would draw attention to position.
Sometimes the torpedo would just hit the hull and bounce off

Is there a min or max distance I should aim for? What is optimal?
Any suggestions not spelled out in the tutorial that you can share would be awesome.. thanks!