The site is the world map and all the airplanes that fly over your head and others. To search a region, city, you can zoom with the left mouse button.
By clicking on the airplane spotted the one you want, you will find on the left of the screen all the answers to questions with a photo of the plane, and the names of the airports "Start" and "Arrival" The position airplanes, their speed, altitude are updated automatically every 10 seconds.
It is almost like a control tower (on satellite).
Then go at work...
And mainly don't forget to claim your salary, at the end of this month, to the UNITED AIR LINE
Not very good coverage in the US though, only shows planes in some areas on the east and west coast, nothing in the central areas.
Interesting site though.
Back around 90 I used to play a game called TRACON that was an air traffic control simulation. I remember I played that game a lot and really enjoyed it. Before that there was one called ATC that was available on for a variety of machines including the Apple ][, I played that one a lot too.