Here is probably one of the first in-car GPS navigation systems in the world; designed in 1930′s. You may call this map guidance tool since this device had nothing to do with giving directions or geostationary satellites.
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(Possibly) called Iter Avto, it works using rolling key map and the speed of rolling depended on the speed of the car.
And if you ever wanted to make a turn into a new street you’d have to find the scroll paper for that street and quickly swap it in.
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when it comes to car radios, i prefer to use either Alpine or Pioneer. they are really great brands”;
when i bought a car radio, i picked the car radio that is built by philips because they are well built ~:-