What does "Squawk" refer to in air traffic control?

"Squawk" refers specifically to the act of setting transponder codes for radar identification. In air traffic control, pilots are instructed to "squawk" a specific four-digit code on their aircraft's transponder. This code helps air traffic controllers identify and track the aircraft on radar. The squawk code acts as a sort of unique identifier that enhances situational awareness for both the pilot and air traffic control. This is especially important for maintaining safe distances between multiple aircraft in busy airspace.

The process of communication with ground stations, taking off, or landing does not involve the use of transponder codes and hence are not relevant to the term "squawk." This term is exclusively tied to the transponder settings, making it essential knowledge for anyone involved in aviation and air traffic operations.