The automatic surveillance ADS - B is a low cost-monitoring system that provides periodic transmission of the aircraft parameters (identification, position) through the data link transmission mode. Information from ADS - B is transmitted, regardless of which user will receive it (another aircraft, air traffic controller), and without waiting for an answer to the user. Nevertheless, it is required that the information was made available in areas of surveillance by air traffic control. Each user, both in the sky and in the ground station can choose how to use the system: receiving, processing and displaying information.