Tried and True Tactic

[switch.dota]

Originally Posted by Hitman

Hummm, that gives me nice idea about how to "Break the ship's back" without a magnetic exploder torpedo: You just dive under the enemy and then blow ballast when exactly below his keel

It works really well you know. Best way ever to get rid of DDs. Just make sure that you put at least one shell/AA bullet into the burning wereck before it goes boom, so you get credit for the kill.

This tactis is so cheap you wouldn't even believe it. The only part of a DD that WILL cause damage to anything but deck gun/flak guns is his bow. Keep your sub's body away from that and you'll be one lean mean shipbreaking machine.

EDIT: Here's how it should look if properly executed (yes, there is only ONE DD in that image):