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Navigation System

Navigation System

A navigation system is an electronic unit that helps users to find their way to the desired destination. It guides the driver along the ideal route to any chosen destination by means of acoustic announcements and visually displayed directions.

The system is made up of the following main elements: a GPS aerial, a navigation computer and a display. With the aid of the Global Positioning System (GPS) the navigation system can determine the vehicle’s position to within just a few metres.

By using this constantly updated GPS data and by comparing it with the values provided by the wheel speed sensors of the anti-lock braking system, the computer can calculate the vehicle’s route. For this purpose, it requires the complete road network in digitised form as its base information. This information is compiled on a data medium (CD-ROM, DVD or hard disk).

Once a destination has been entered, the integrated navigation computer calculates the fastest or shortest route and compares the calculated route with the vehicle’s current position throughout the journey. If these do not coincide – because the driver has decided to take a different route to avoid a traffic jam, for example – an adapted route is calculated.

Dynamic route guidance is possible with the Traffic Message Channel (TMC). This enables the navigation system to detect traffic hold-ups automatically and offer an alternative route.

The latest-generation radio/navigation systems are impressive for their convenient operation and multifunctionality.