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- ICAO DOC 4444, Chapter 12 PHRASEOLOGIES Chapter 12 PHRASEOLOGIES 12.1 COMMUNICATIONS PROCEDURES The communications procedures shall be in accordance with Volume II of Annex 10 — Aeronautical Telecommu
- ICAO DOC 4444 / 12.3 ATC PHRASEOLOGIES / 자주 사용하는 ATC 용어 12.3.1.1 DESCRIPTION OF LEVELS (SUBSEQUENTLY REFERRED TO AS “(LEVEL)”) a) FLIGHT LEVEL (number); or b) (number) METRES; or c) (number) FEET 고도를 표현할 때 주로 사용하는 용어