Will a magnetic torpedo still explode if it hits the hull?
I've never used a torpedo set to magnetic yet, but should learn.
Long story shortened a bit - had two aux. cruisers 'escorted' by a DD, sunk one aux., almost had the other one - fired a stern torp at the destroyer, was then going to get the second aux., the stern torp went UNDER the destroyer

!!! Had to crash dive, but then he got a lucky depth charge attack on me as I wasn't submerged enough. Yup, that really hacked me off.