What is PTT in aviation terminology?

PTT in aviation terminology refers to "Push to Talk." This function is critical in communication within an aircraft and between aircraft and ground control. It allows pilots and air traffic controllers to communicate effectively by using a switch that activates their microphones. By pressing the button, the user can speak, and when the button is released, it allows them to listen, preventing overlapping transmissions that could lead to miscommunication.

The "Push to Talk" mechanism ensures that only one party can transmit audio at a time, which is essential in the busy and high-stakes environment of aviation communication. This practice minimizes confusion and enhances operational safety in communications, as it helps to clarify who is speaking and when, thus maintaining an orderly exchange of information.