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The Pilots Desk
ICAOICAO Annex 10

ICAO Annex 10 — Aeronautical Telecommunications

Read the official rule

Annex 10 standardises aeronautical communications, navigation and surveillance (CNS) — radio frequencies and procedures, navaids (VOR, ILS, GNSS), and surveillance systems (radar, ADS-B). It's why a navaid or radio works the same way internationally. *Summary only — consult ICAO.*

This is an original plain-English explanation for training and reference, not legal advice and not for navigation. Always rely on the current official rule linked above. Last reviewed June 2, 2026.