What do the purple lines mean on flightradar24?

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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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 purple line on an aeronautical chart typically indicates an airway, which is a defined route through the airspace that connects two navigation aids, such as VOR (Very High Frequency Omnidirectional Range) stations. Air traffic controllers use airways to route aircraft along designated paths in the sky.

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The white line is basically estimated position while the green is when the aircraft is actually being tracked.

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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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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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From the time it lifted off from Kuala Lumpur at 15:42 local time, SPAR19 was already the most tracked flight on Flightradar24 among active flights. 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.

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Squawking 7700 in an emergency 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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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. Space-based ADS-B tracking will be used to supplement our terrestrial receiver network.

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The Blue Angels don't show up on FR24, but Fat Albert does!

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FlightRadar and similar websites use several sources for aircraft detection, most commonly they use ADS-B. Not all General Aviation aircraft, to which helicopters would count normally, are equipped with transponders that are capable of emitting ADS-B data.

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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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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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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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While fuel dumps don't happen every day, they're also not uncommon. Nor do they usually represent a major emergency. In fact if an aircraft is taking the time to dump fuel before landing, that's likely an indication that the issue forcing the plane to land is serious but not critical.

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Aircraft Instruments that Help the Pilots See in Cloud The pilots also have a weather radar which can be viewed on their screens and this can help them determine what type of cloud it is they are flying through (or approaching), how much water there is in the cloud, and if there are more clouds behind it.

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