What I'm saying is that a) 90s-era OP would definitely have been using the interstate and b) if they drove more than 30 minutes off the interstate then they ignored so much data and common sense that it's unlikely tech would have helped them here. (E.g., if you want Iphone directions to L.A. but it gives you Louisiana, you still have to interpret the data the phone is giving you to notice you're not going to the correct destination.)
Your compass would be telling you you were going west well before you got to Key West. :-)