Which term refers to the airborne portion of the ATC radar beacon system?

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Study for the Pilot's Handbook of Aeronautical Knowledge Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which term refers to the airborne portion of the ATC radar beacon system?

Explanation:
The airborne component of the ATC radar beacon system is the transponder, the on-board equipment that responds to radar interrogations from ground radar. When the ground radar sends a signal, the transponder replies with identifying information and altitude data (and more with newer modes), allowing air traffic control to see who you are and how high you’re flying. This exchange enhances target identification and altitude separation on the radar display. Other terms don’t fit: trim is a flight-control function, the troposphere is an atmospheric layer, and TWEB is a weather information broadcast—not part of the radar beacon system.

The airborne component of the ATC radar beacon system is the transponder, the on-board equipment that responds to radar interrogations from ground radar. When the ground radar sends a signal, the transponder replies with identifying information and altitude data (and more with newer modes), allowing air traffic control to see who you are and how high you’re flying. This exchange enhances target identification and altitude separation on the radar display. Other terms don’t fit: trim is a flight-control function, the troposphere is an atmospheric layer, and TWEB is a weather information broadcast—not part of the radar beacon system.

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