Final answer:
The Secondary Surveillance Radar (SSR) or air traffic control radar beacon system (ATCRBS) is used by pilots to respond to radar signals with a transponder, resulting in a special display on air traffic controllers' consoles.
Step-by-step explanation:
The question refers to the technology that allows a pilot to transmit a response that triggers a special display on an air traffic controller’s console. This system is known as the Secondary Surveillance Radar (SSR) or air traffic control radar beacon system (ATCRBS). Pilots use a device called a transponder that receives interrogation signals from the radar system and sends back a coded response. The transponder code can provide information about the aircraft’s altitude, identity, and emergency status, which is then displayed on the air traffic controller’s screen.