Prime base, forty years in the hole!

[.45cultist]

They could build a mining town and not tell their dependents until close to the date. Or they could tell their dependents it's a CD fallout shelter/ storm shelter provided by the company. The abandoned town could have become the refugee colony.

[Nowhere Man 1966]

I think the AutoNav could have been done in the 1980's, I do remember Oldsmobile working on one in the mid 1980's for its Toronado that used a green screen. As you got closer to 1989/90, the Oldsmobile Toronado Trofeo had a full color display.

http://www.businessinsider.com/gms-o...-system-2014-9