Oh, interesting.

And the seas were so rough that when they were submerged off the coast of Norway in the Arctic Ocean on the way to spy on the Soviets, that physics occurred and the hydrogen bubbles began building up on the plates within the batteries.

And each submarine has two battery compartments.

I mean, they're bigger than a nine-volt battery, but they're huge batteries.

But they are what drive the ship when submerged.

They secure the diesel engines and operate on battery power.

Well, that hydrogen built up inside the ship And it coincided with a short circuit in the aft battery compartment.

Yeah.