090 Communications

EASA code: 090

Communications covers aeronautical radio services, standard phraseology, radar procedures, Q codes, weather broadcasts, emergency communications, and radio theory.

Chapters

1. Principles & services — duplex/simplex, ATS units, service hours
2. Phraseology & callsigns — numbers, frequencies, callsign formats
3. Radar & surveillance — procedural/traffic service, transponder, vectors
4. Departure & approach — take-off, circuit joining, missed approach
5. Q codes & reporting — QFE/QNH, position reports, message priority
6. Weather & ATIS — METAR, RVR, VOLMET, braking action
7. Emergencies & radio theory — MAYDAY, comm failure, VHF/HF
8. Key notes — quick revision tables