First Car Navigation of 1969: How It Worked

In 1969, motorists gained access to an early navigation system that worked in conjunction with a cassette player. The device provided voice instructions on which way to turn, based on the car's current location.

The operating principle was based on sound signals of varying duration recorded on tape. An electronic unit under the dashboard converted the tone length into the number of miles to be driven before the next command.

To accurately calculate the distance traveled, the box was connected to the odometer via a mechanical cable. A gear mechanism transmitted wheel rotation data, and when the required value was reached, the next instruction was played.

The system required calibration for specific vehicle tire sizes. Setup was performed using a special cartridge with a built-in printed circuit board, installed in the device's internal connector.

• Navigation depended entirely on the accuracy of the odometer readings
• Deviation from the route disrupted the calculated distance
• It was impossible to stop the counter or return to the previous step

Despite the primitive nature of the technology, this was an important step in the development of automotive assistants. Driver errors led to disorientation, as the system could not adjust the route on its own.

A detailed demonstration of the historical navigation system can be viewed on YouTube.