Doss Boats - I Don't Know What the Nazis Are Up To.

There's a little bit of Star Trek in this, one of the real combatty episodes. Hack, you know, hailing frequencies, Mr. Chekhov. Romulans use a cloaking device. We're not sure where they are. Here's another thing. Anytime they go underwater, they can only go about a third as fast as they could on the surface. It ends up becoming such a convoluted thing that if you want to ignore it, you can.