LiveATC.net (Abbreviated as LiveATC) is an audio streaming site that provides a live feed of Air Traffic Control communications around the world.

As of May 1, 2015, there are over 1150 active feeds available, ranging from Clearance Delivery to sections of low-altitude Center sectors.

Air traffic control (ATC) is a service provided by ground-based controllers who direct aircraft on the ground and through controlled airspace, and can provide advisory services to aircraft in non-controlled airspace.

The primary purpose of ATC worldwide is to prevent collisions, organize and expedite the flow of air traffic, and provide information and other support for pilots.

In some countries, ATC plays a security or defensive role, or is operated by the military.

Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects.

It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.

A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the object(s).

Radio waves (pulsed or continuous) from the transmitter reflect off the object and return to the receiver, giving information about the object's location and speed.