Practice question

What does the term 'GARBLE' mean in Secondary Surveillance Radar (SSR) technology?

  1. The overlapping and distortion of transponder reply pulses from two aircraft in close proximity to the radar antenna
  2. A complete loss of primary radar signal
  3. A software crash on the controller console
  4. An invalid transponder Mode A code entry

Answer: A — The overlapping and distortion of transponder reply pulses from two aircraft in close proximity to the radar antenna

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