It's interesting how much of this stuff is just out in the open when you look for it. The big yellow thing is a float, i remember the team working on it had dragged it out of the water with a truck. This pump assembly was on the bottom. I thought it was some king of water quality tester but then i saw the modulator. From the oxidation it's taken quite a beating, i'm guessing they were using the lake water as cooling for some sort of despin resonance operation. You don't want that sort of thing unmodulated on an autonomous platform.