How do I get inside a convoy?

It was the inner ring that nailed me the one time. I was sumberged and completely stopped. I got unlucky that during one of his sweeps he came close enough for that inner ring to touch my boat. The response was immediate, swift, and fatal.

So now I'm trying to be more careful than that, knowing that one wrong move will have me avoiding DCs BEFORE I make my attack, not after. I hate being hounded by destroyers, but it's a lot easier to take if you inflict some pain on the convoy. If they nab you before you get close enough to shoot, it's very annoying.

Thanks for the advice, guys. I appreciate it. And as for the cruiser, it's dead center of the convoy, which tells me the British think it's the most important thing in there, so I think I'm going to go for it.