Sonar has developed a base control station software able to handle up to an unlimited number of subscribers. It is possible to store in the customer's data base all the information of each single customer, visualise on digital map the vehicle's position and the received messages. In case of need it is possible to activate at distance the engine cut off, making interrogations and sending codified orders via SMS messages. SW 20 software control system up to 20 vehicles SW 100 software control system up to 100 vehicles SW 1000 software control system for an unlimited number of vehicles Datalog manager software program for downloading and visualizing on digital map the vehicle's historical route