Prometheus Prometheus, you likely all know what it is by now and are probably sick about hearing the criticisms regarding various confusions it has produced, but one of these confusions has a rather plausible answer, even if it is not directly mentioned in the film. To be honest, it's probably such a common aspect of the ship that it wouldn't even bare mentioning between the Crew of the Prometheus anyway, which is exactly why it isn't. This aspect is the APC that is inexplicably driven back to the Prometheus after some of the Crew members first explore the Engineer Ship, despite the fact that because two of the Crew, Fifield and Millburn, become lost and stuck in the Ship and we see the others commandeering the remaining vehicles, there was no-one there who could have actually driven it back. The plausible answer to this is that as soon as Janek, the Captain of the Prometheus, realised that there was a storm coming and that there was not enough Crew to bring it safely back, he could easily have engaged an auto-pilot of some description on the APC to drive back to the Prometheus by itself. Although we never specifically see him do so, it does not mean that he doesn't. Also, because certain scenes were cut and re-ordered later in the film, the APC doesn't play a particularly big role in the rest of the film anyway, so it would be unnecessary for us to waste time watching characters discuss the inner-workings of the voyage that they are probably well accustomed to from years of living in the future.
