We’re building up a “desktop” version of our submarine. Not the whole thing just the computers, networks, relays and sensors. It will make coding & testing a lot easier. I just finished soldering up the Arduino daughter board for the command router and internal systems relays.
Now that the new keel weights are mounted on the sub all the stuff that gets mounted above them can go back in. Tanks, valves, batteries, manifolds… But 1st tanks need to be checked.