The giant turtle battle sub, one of the most notorious weapons of the Second War, is really not a vehicle at all. It is a harness and cockpit that fits atop a live giant turtle (with an attached mental control rig). From within the pressurized compartment, the pilot issues commands to the creature as though it were a mount. The battle sub also includes a short-ranged cannon or rocket launcher capable of damaging ships, but only if the giant turtle surfaces.