There is a lot more going on than just the radio communications. There are standard published approaches and departures that will generally be flown (once clear

There is a lot more going on than just the radio communications. There are standard published approaches and departures that will generally be flown (once cleared). Flight plans are filed and clearance given before take-off, so ATC knows where everyone is going. At a large controlled airport, ATC is in control, so less needs to be communicated by the pilots. There are not generally aircraft flying circuits which is what required so much coordination in your example. Most aircraft at large airports are required to have ADS-B(1) which is transmitting aircraft position, altitude, heading, speed, et cetera to anyone who has a receiver, particularly ATC and other aircraft. If everything does go bad, large airliners have TCAS(2). There are also lots of different controllers and frequencies to handle different parts of the airspace: approach, departure, tower (take-off and landing). This is just what I can think of off the top of my head. You can listen to what is actually going on at your favourite airport on www.liveatc.net. (1) https://en.wikipedia.org/wiki/Automatic_Dependent_Surveillance%E2%80%93Broadcast https://en.wikipedia.org/wiki/Automatic_Dependent_Surveillan... (2) https://en.wikipedia.org/wiki/Traffic_collision_avoidance_system https://en.wikipedia.org/wiki/Traffic_collision_avoidance_sy...