[WernherVonTrapp]

If you can hit the BB in it's engine rooms, under the stacks, you'll see a big explosion and the ship will eventually be dead in the water. Also, try to aim for the A/B turrets. You might be able to hit one of the gun magazines causing massive secondaries and, again, she'll eventually be dead in the water, if not sunk outright. I never use magnetic detonators against large warships. For some reason, I could never sink them that way. I always get the best results using direct contact to detonate. That way, more explosive force is directed against the hull. The further away the detonation, the less explosive force is applied.