Practice question

Which ground-based elements comprise a standard ICAO Category I Instrument Landing System (ILS)?

  1. Localizer, Glide Path, and Marker Beacons or DME
  2. NDB, VOR, and Primary Surveillance Radar
  3. GNSS Ground Augmentation Station and SSR Mode S Transponder
  4. Visual Approach Slope Indicator (VASI) and PAPI lights exclusively

Answer: A — Localizer, Glide Path, and Marker Beacons or DME

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