What is the maximum radius in nautical miles that each airport surveillance radar (ASR) can locate aircraft using the identification, friend or foe (IFF) equipment?

The maximum radius that airport surveillance radar (ASR) can utilize for locating aircraft with identification, friend or foe (IFF) equipment is indeed 200 nautical miles. ASR plays a crucial role in air traffic control, providing radar coverage to help manage the movement of aircraft within a specified radius, particularly during takeoffs and landings.

The efficiency of this radar system in detecting aircraft extends significantly up to 200 nautical miles, allowing for comprehensive coverage around an airport. This range ensures that air traffic controllers can identify and monitor aircraft properly, enhancing safety and operational efficiency. Other options, while they represent distances within radar capabilities, do not reach the full extent provided by modern ASR technology in conjunction with IFF systems. By utilizing a maximum radius of 200 nautical miles, airports can better respond to various flight activities and ensure proper airspace management.