Deck & Conn is a cat-and-mouse MicroProse homage to a 55-year-old Star Trek game that might not be chunky enough for today's simulation sickos
There's no "APU" on the bridge display, but I'm guessing they mean "auxiliary power unit". Now I have to wait a few turns, then switch on the actual reactor, and spend another couple of turns waiting for it to fill the battery.
