Ground operations via ATC?
I have a burning question to what involvement ATC has in ground operations.
My question or questions are:
1. How does a tug know when an aircraft is ready for departure? Is this controlled by ATC?
2. How does the airbridge system work? I doubt this is via ATC so how do the ground staff know what stand/gate the A/C has been allocated to so that they can bring the bridge to the A/C?