There's nothing like a 'down the throat' shot at a pursuing destroyer. I set the eel (electric preferably) for .5M below the keel, wait for it to close within 500M and let 'er rip. Usually they stop zig zagging at that point and are charging in for the kill.. Just about then, the mag torp explodes under their stern and sets off the racks of DC's.. Talk about fireworks!!!