Is it me or?
 

or... torpedoes do not explode if set to magnet detonation?
sorry to bother.

If I have them on magnetic and fast I get lots of duds that pass right under, especially if they pass under at a 90 degree angle. On slow speed and shot from 45 degrees or so forward so they are under the ship longer they are fairly reliable, probably too reliable in all actuality but I don't mind. Sometimes fun is better than history to me.