Aviation English
Advanced ATC

What is High-Frequency Data Link?

High-Frequency Data Link A long-range communication system enabling digital message exchange between aircraft and ground stations via high-frequency (HF) radio bands, often used for ATC datalink in oceanic and remote airspace (ICAO Doc 10037).

Source: ICAO Doc 9432, FAA PCG

How is “High-Frequency Data Link” Used in Practice?

Use the High-Frequency Data Link as primary datalink when VHF and SATCOM coverage is unavailable.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

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Frequently Asked Questions

What is High-Frequency Data Link?

A long-range communication system enabling digital message exchange between aircraft and ground stations via high-frequency (HF) radio bands, often used for ATC datalink in oceanic and remote airspace (ICAO Doc 10037).

Where can I learn this term for free?

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