Tarzan T2-1 vehicle tracking unit equipped with state of the art GPS receiver provides reliable and accurate tracking and navigation data. The unit when installed gives data to vehicle owners or third parties to track its location whilst in truck, car, ship container or any machinery which is moving. The communication medium used can be GPS, GPRS, or SMS. The unit is provided with a RS 232 port for configuration and can be remotely configured. It has a SOS panic button for emergency situations to communicate with predefined numbers or servers. A voice communication module is also available for 2 way communication.