Transponder

{
  "id": "MLC-T-AVN-001049",
  "term": "Transponder",
  "field": "Aviation and air traffic control",
  "definition": "The airborne radar beacon receiver/transmitter portion of the Air Traffic Control Radar Beacon System (ATCRBS) which automatically receives radio signals from interrogators on the ground, and selectively replies with a specific reply pulse or pulse group only to those interrogations being received on the mode to which it is set to respond.",
  "see_also": [
    "Interrogator",
    "Transponder [ICAO]"
  ],
  "references": [
    "AIM",
    "FAA Pilot/Controller Glossary"
  ],
  "url": "https://mlchart.com/terminology/aviation/transponder/"
}