The present invention relates to a mobile station of a navigation system. In the system, the mobile station includes a transceiver for making a connection to a base station via a radio link. The base mobile is operable to receive an order from the base station. The order includes a description of the order and a destination corresponding to the order. The mobile station is operable to calculate a route to the received destination. The mobile station is operable to display the description of the order. The mobile station is operable to enter a change of a status of the order; and to send the change of the status to the base station.