The rac120 in car gps system is navigational data receiving system. Apart from its car navigation facility it does have other technological advantages. For example, the rac 120 in car gps system can be applied for marine guidance as well as correctly positioning of concerned out door activities. The operational feature of the rac120 in car gps system is something that can easily be understood by a person having little technical knowledge. It obtains its data on the area you are driving from satellite. Alternatively, you could go for the Magellan Roadmate 700 Gps.