A vehicle is ‘polled’ to find its exact ‘real time’ location. The fleet managers is able to click on a button on his computer screen, which sends a message to the specified vehicle, to which it responds by sending a data packet giving all the current information that is has being stored on the unit on the vehicle. The results are then displayed on the mapping and reporting software. When deployed using GPRS communications, C-track can be configured to update the base station at regular intervals for a fixed monthly communication cost. If the unit is configured to provide 5 minute 24×7 updating for example, the requirement to “poll” the vehicles in any case becomes largely unnecessary.