What does a black line mean on flight radar?

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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If the plane is below 100 meters in altitude, the trail will be white. If it is above 100 meters, the trail will yellow, then green, then above 2500 meters it will become light blue, then dark blue, purple and for the highest altitude it will be red.

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On the map a coloured line shows the route of the aircraft. Purple colours indicate cruising altitudes. White colours indicate the plane is on the ground. As a plane takes off, the colours change from white, to yellow, to green, to light blue, to dark blue and finally to purple.

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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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when you click on it it's red. this is a ryanair aircraft. it's currently skorkin 7700. which means it's in an emergency.

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Flightradar24 Support center
  • Each color indicates a different flight status. ...
  • Gray: The flight is scheduled and there isn't an additional status available.
  • Green: The flight is estimated to be on time or arrived at time.
  • Orange: The flight is estimated to be delayed or was delayed.


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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 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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The dashed line is the flight's filed/planned route and is shown when we have that data available. That's the Wall to keep out the white-walkers. The dashed blue line is the intended flight plan route. The green line is where it actually went as tracked by reception of the ADS-B transmissions from the aircraft.

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The position is calculated based on many different parameters and in most cases it's quite accurate, but for long flights the position can in worst cases be up to about 100 km (55 miles) off. In settings there is an option to set for how long time you want to see estimated aircraft on map.

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Military aircraft in particular are exempt from many civil rules and regulations which would see most aircraft having an active transponder and of course their operational requirements will dictate they often do. That said, ultimately, any plane CAN disable it if they wish.

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A discrete transponder code (often called a squawk code) is assigned by air traffic controllers to identify an aircraft uniquely in a flight information region (FIR). This allows easy identification of aircraft on radar.

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These different colors indicate different ranges. This white arc indicates our flaps operating range, this green arc identifies a normal operating range, this yellow arc represents a sort of caution or smooth air only range, and then the red line indicates our maximum speed that we can go in this aircraft.

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If the 7500 squawk code is mistakenly selected, the pilot will immediately receive a call from air traffic control asking for confirmation. At this point, the pilot in command or the first officer is able to inform the transponder code has been used by mistake, and that there is no hijacked aircraft.

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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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1200: Visual Flight Rules (VFR) flight, this is the standard code used in North American airspace when no other has been assigned (*)

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Takeoff: Two quick, loud thumps from under the plane, and a repeated whooshing noise that sounds like a spinning propeller. The whooshing noise is air from the engines (the air used for the cooling and heating system) changing as the RPM of the engine increases.

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