[B_O_L_T]

I have had plenty mag detonations go off up to 2 metres under the keel of larger ships although I usually use 1.5, set slow speed and even with duds enabled most work. By default the tI steam torps have mag enabled, tII are off by default, are you folks sure you are not actually turning it off, or perhaps messing about with the toggle breaks them in some way. Also make sure you are correctly identifying your target to get the right draft to set torps, both steamers and liberty cargo have a 2 metre shallower draft than the others and are the most common cargo ships seen, and regardless of what an external cam displays you have no chance in hell of getting a mag det if you are 2 metres off, the external cam can be way off, never use it to evaluate an kind of performance, it's more of an action cam than a cm perfect representation of the underlying simulation.

BTW yes there are duds, I had a boat destroyed by a premature detonation, and on a couple of occasions had a torp reported as a dud by my xo. No idea if difficulty has anything to do with it but I play on 100% realism.