I was playing a game the other day that came down to the wire. I had to get my spaceship done before the UN vote. It was dead even, so I needed to get my stassis chamber finished a turn sooner. I had some spare cash around and bought a forge. I didn't think it would work but it did. So spaceship parts are considered land units and a forge gives production boost to land units. It was pretty cool because it won me the game but still, should spaceship parts really be considered land units?