[Deep Ocean Machine]

It's not immediately clear what they're for. There are lots of lights, or there were supposed to be lots of lights, since they're not shining right now. Lasers. Maybe all converging on a point impossibly far overhead. The gears, from how they're slowing down, seem to be about rotating those six rings. Somehow. Without touching them.
There's lots of spaces too small even for the tiny sub to get into, like at the base of the lights.