Why is a plane blue on Flightradar24?

Blue: Aircraft displayed as blue icons are currently being tracked via satellite. Satellites are collecting the ADS-B signals from aircraft and transmitting them to the Flightradar24 network.



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From 3 March 2020, ADS-B data collected by satellite was made available to all users. Aircraft located using satellite data are coloured blue on the map, and yellow if located by terrestrial receivers.

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Flightradar24 is the first flight tracking service which offers space-based ADS-B-tracking. The blue planes on the map are tracked from a satellite and the yellow ones are tracked from the regular earth-based radar stations.

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I often see military flights in the sky, which do not appear on FlightRadar24. I do understand that low-flying military airplanes do no necessarily get picked up by these trackers, and that some military aircrafts switch of transponders. However some flight do appear on this ADSB-Tracking website.

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If the trail is a black dotted line, the aircraft is outside our coverage area and its position is being estimated.

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The most well know of these is the code 7700. This is used to indicate an emergency of any kind. A pilot will enter this when in an emergency situation - either instructed by ATC after declaring an emergency or without communication if there is no time.

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Does FlightRadar show private planes? Yes, it does, but the data is limited. If an operator doesn't want their personal details published, FlightRadar will block out that information or even omit showing the aircraft directly related to high-profile individuals, like Air Force One.

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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.

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If the aircraft's position surpasses 2500 meters in altitude, the trail will be light blue, and will then change to dark blue, purple and finally red for the highest possible altitude. If the trail is a black dotted line, the aircraft is outside our coverage area and its position is being estimated.

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Currently, the bragging rights for the longest flight in the world belong to Singapore Airlines' New York City to Singapore route. Its longest flight path, which connects Singapore's Changi Airport with New York's John F. Kennedy International Airport, 9,585 miles away, takes 18 hours and 40 minutes.

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The first emergency code that you may have become familiar with is Squawk 7500. This code is used to indicate that the aircraft has been hijacked, and therefore requires urgent emergency support from both security services and air traffic control.

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SQUAWKing is the process of communicating between the air and the ground, the process is essential for keeping planes in the air safe and ensuring a smooth and manageable air traffic control process, both for pilots and air traffic controllers.

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The 3 Must-Know Aircraft Emergency Squawk Codes For Pilots
  • 7700 – Distress or Urgency Condition. Before we begin discussing emergencies, let's define our terms as listed in the Pilot/Controller Glossary. ...
  • 7600 – Two-Way Radio Communication Failure (NORDO) ...
  • 7500 – Air Piracy (Hijacking or Hostile Acts Onboard)


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Flightradar24 is a global flight tracking service that provides you with real-time information about thousands of aircraft around the world. Our service is currently available online and for your iOS (iPhone, iPad, iPod Touch) or Android device.

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Flightradar24 Support center If a flight has an asterisk (*) next to it, it means it is currently later at the departing airport than the expected departure time and the flight is not yet active.

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The closest competitor to flightradar24.com are flightstats.com, flightaware.com and airportia.com. To understand more about flightradar24.com and its competitors, sign up for a free account to explore Semrush's Traffic Analytics and Market Explorer tools.

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Popular flight tracking website Flightradar24 has suffered a data breach that possibly compromised the email addresses and hashed passwords of a small subset of customers. Users have received emails requesting them to reset their passwords.

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