The grey area there indicates that the aircraft is out of coverage ( an estimated flightpath is presented) for that part of the flight. The altutude graphic is part of the Skyaware map you have when you are feeding data towards Flightaware.
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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.
Flightradar24 Support centerEach color indicates a different flight status. Below are the meanings behind these colors: 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.
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.
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.
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.
While the specifics vary depending on your tracker of choice, generally speaking, you can input any flight number into a flight tracking app or website and see all the key data about that flight, from its ETA to its altitude to its ground speed.
A grey charter is any unlicensed charter flight operation. While these illegal operations aren't new on the aviation market, they have been on the rise throughout Europe and the rest of the world in recent years. Grey charter flights are a risky proposition.
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.
How do I track an aircraft that is not available for public tracking (blocked)? To track a blocked aircraft, you must be the owner or operator and it must be selectively unblocked through a FlightAware Global subscription.
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.
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.
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.)
Not being show on Flightaware just means they are on one of the block lists maintained by FAA and EASA. There are military encrypted transponders, that's something you can't receive locally. I've noticed i see tons of military aircraft on ADS-B Exchange but on Flight Aware they don't show up.