The ATC is a feature added for Police and UNMC to message pilots on the server.
UNMC and Police commands will be establishing rules for it's use and you will shortly be informed about how it is to be used.
Guys it's a roleplay mission, it makes no sense for a uniformed soldier to walk into a headquarters of a police force that has undergone recent hostile operations to that soldiers unit.
This is something I believe is missing from the server, people doing the little jobs, scoping out their...
It's full of all the stuff the UNMC steals from everyone else.
Just kidding, it's full on broken and always has been. Only AdminCP can see it. (Wilco, Ciaran, whoever else blah blah)