The data on FlightAware.com usually has a 30-second delay from real time. In some countries, such as the United States, federal regulations require a five-minute delay. The information is accurate and comes from government sources in Europe, North America and Oceania, air carriers and commercial data providers.
FlightAware also operates its own ADS-B flight tracking network. This worldwide system tracks aircraft equipped with ADS-B technology. The receivers are installed at dozens of airports around the globe. The abbreviation stands for Automatic Dependent Surveillance - Broadcast. The system is always on, provides accurate positional data and continually broadcasts that data to any carrier or company equipped with an ADS-B receiver.