How can a radar help prevent collisions of airplanes?

Radar helps prevent airplane collisions by providing real-time tracking of aircraft positions and movements. It detects and displays the location, altitude, and speed of planes in the vicinity, allowing air traffic controllers to manage and direct their movements safely. Additionally, onboard radar systems in aircraft can help pilots maintain situational awareness and avoid potential mid-air conflicts, especially in crowded airspace. By facilitating timely communication and decision-making, radar plays a crucial role in enhancing aviation safety.