Dotted line is potential path. Usually flights over oceans are out of reach. Some of them are tracked by satelites.
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A note about Estimated coverage: when you see a dashed or gray line behind an aircraft, that's estimated coverage. Colored lines indicate actual positions. When an aircraft is out of coverage, we estimate based on great circle routes to destination.
Green is from a reported position.The white with the circle is an estimated position since the aircraft might be outside of the area that FA gets radar data for.
While it may sound shocking to some, the simple fact is that some aircraft may simply not have their transponder on, or it may be temporarily off, or they may be carrying passengers or cargo, which warrant deactivation. In addition, not all airspace activity is always relayed to FlightRadar24 at all times.
The dotted lines in the network map indicate that the devices are connected to the network wirelessly. So, according to your map, one of the Airport Express devices and your Extreme base station are plugged in via Ethernet and the other two Express devices are wirelessly extending the network.
Some high profile aircraft, such as Air Force One are not displayed. Most other aircraft subject to restriction are shown as anonymized by aircraft type.
I was following an aircraft when it suddenly disappeared, why? In most cases, our receiver network is no longer receiving a signal from the aircraft. This tends to be more common when an aircraft is flying over large bodies of water. It can also be a technical problem somewhere.
By the time it landed in Taipei, SPAR19 was being tracked by more than 708,000 people around the world, making it the most tracked live flight in Flightradar24 history. Over the seven hours from Kuala Lumpur to Taipei, a total of 2.92 million people followed at least a portion of the flight.
Different levels of intensity echos from weather radar. Light blue might just mean clouds but green, orange, red, and purple are increasing intensities of showers/storms.
Flightradar24 is the more customizable of the two, and while FlightAware says it tracks more flights, it lacks options like showing planes on the ground. (There's also a third flight-tracking app and website, Planefinder, which looks and feels similar to Flightradar24 and has the same price for the premium version.)
Our most asked question on social media: “What do the blue planes mean?” Blue planes indicate aircraft are being tracked by satellite-based ADS-B receivers.
Red: When an aircraft is displayed as red that means that you are currently following that specific aircraft on the map or that the aircraft's transponder is squawking an emergency code. These codes are 7500 (Hijack), 7600 (Communication Equipment Failure), 7700 (General Emergency)