I recently played online and found one of the players was an ATC controller. He could see what everyone was doing and even warned me of an impending crash!!!!!!!!! How could I do that and how do I do that? Thanks a lot.
When you say 'played online' do you mean a multiplayer session or VATSIM??
I'm not sure how you can be an ATC controller but these key commands may be of help...
Track Mode On/Off CTRL+SHIFT+D
Cycle Through Other Players CTRL+SHIFT+T
Follow Other Player CTRL+SHIFT+F
Switch To Observer Mode CTRL+SHIFT+O
Hope this helps 😉
I think they have add-on radars or something.. at least they use a program that can see your exact location, altitude and speed etc...
most often, when I fly, there are ATC's.. it's much more fun, because (if they're good) they're MUCH better than the default FS ATC.
Today I flew with the best ATC controller I've ever flown with on FS. he was at KSEA so he just called himself "ATC controller KSEA".. dunno who he was, unfortunately.
There was A LOT of trafic at KSEA (like there always is online..) and still he managed to handle it very well, and I landed safely 😀