GPS-based tracking with high levels of precision. Some older aircraft use inertial reference units instead of GPS for positions, decreasing positional accuracy.
How it works

GPS-based tracking with high levels of precision collected by satellites. Some older aircraft use inertial reference units instead of GPS for positions, decreasing positional accuracy.
How it works

Time difference of arrival based tracking with high positional accuracy during most phases of flight, except tight turns. Accuracy of speed data dependent on individual transponders and number of receivers in the area.
How it works

GPS based tracking used in light aircraft, such as a gliders. Variable levels of data quality based on limited tracking capabilities for gliders.
How it works

3rd party data covering North America and certain oceanic regions around North America, provided to Flightradar24 as is with variable quality based on multiple factors.
How it works

An aircraft's position may be estimated for up to 240 minutes after coverage has been lost based the great circle path between last received position and destination. Accuracy of estimated positions will vary based on time since last received position and flight route.
How it works

This aircraft is broadcasting an invalid transponder code due to malfunction or incorrect programming.
How it works

• {radar}

  Receiver code displayed is randomly chosen from all receivers currently seeing the aircraft.