During my first(an dhtis far only) raid on Dover I didn't have a idea about mines in the game. I got a chock when I read somewhere that Dover has lots of mines around the port

I must have been very lucky, since I didn't hit on,e it was bloody dark and I didn't see anything either. But I'd really like to see a mine some day(but, not very keen on getting to close). Is it only if you hit the mine it explodes, or does it have magnetic sensors (or something:hmm: ) that explodes if you get like 3 meters away, or what?