Tap an address into your phone or glance at your dashboard screen and a route appears in seconds — it feels completely unremarkable today. Yet built-in satellite navigation had to start somewhere, and the answer is a rotary-powered Japanese grand tourer that most people have never heard of. The Mazda Eunos Cosmo, which debuted in 1990, was the first production car to offer GPS navigation as we know it, and its influence quietly shaped a feature now found in virtually every new vehicle on the road.
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