Apparently not. There's a pretty fascinating story about Etak, who made a dead reckoning-based car navigation in the mid 1980's: http://www.fastcompany.com/3047

Apparently not. There's a pretty fascinating story about Etak, who made a dead reckoning-based car navigation in the mid 1980's: http://www.fastcompany.com/3047828/who-needs-gps-the-forgotten-story-of-etaks-amazing-1985-car-navigation-system http://www.fastcompany.com/3047828/who-needs-gps-the-forgott...