Came across a small merchant in heavy seas, usually i dont engage but i wanted to use up my torps so i went after it. I set the torp to 3 meters depth at fast speed setting, waited till 0 gyroangle then fired just forward of the bridge. Look:
The broken off part whipped off the ship like somebody released a huge spring. The plume from the explosion barely reached the bridge and it looked like it does in the shot. Weirdest thing ive ever seen.