I think I get what the OP is after, but a description in which the player is stunned and has no idea what the strange machine on the bridge is for is also a little overdone.
The shuttle is just a quest plot point and a backdrop object, it does not really play an important role.
If the tribalism background had to be overplayed the player would have been confused by anything pre war he/she would encounter; junked cars, computers, robots, nuclear power plants and so on.
Personally I feel that the tribals of Arroyo were not all "The sun is magic" type (people who had forgotten all the knowledge of the pre war world and had return to a low civilization/superstitious state).
Characters like the player were most likely the exceptions, still having a general understanding of the world including stuff from the pre war civilization.