Radio Communication Principles and Procedures
Principles and phraseology
The Radio Communication Principles and Procedures domain tests clear, standard radio use. VHF airband communications are line-of-sight, so terrain and range matter. Use the phonetic alphabet, standard words and the correct callsign. Read back safety-related clearances: runway and hold-short instructions, altitude, heading, frequency and squawk. “Roger” means “I received your transmission”, not “I will comply”. “Wilco” means “I will comply”. Use “Mayday” for distress and “Pan Pan” for urgency. The international emergency frequency is 121.5 MHz. ATIS provides recorded aerodrome information; a clearance is not an instruction to enter airspace until it is correctly understood and read back.
Worked example
Controller: “G-ABCD, cleared to enter controlled airspace, maintain 2,000 ft, squawk 7000.” A correct readback is: “G-ABCD, cleared to enter controlled airspace, maintain 2,000 ft, squawk 7000.” Include the callsign at the start or end. If the clearance includes “hold short of runway 27”, read that back explicitly; a simple “roger” is not sufficient.
Traps
Do not use “roger” as a readback of a clearance. Do not omit your callsign or use another aircraft’s callsign. Do not say “take-off” unless the controller has issued a take-off clearance; use “departure” or “line up and wait” as appropriate. Keep transmissions short and do not block the frequency. If unsure, ask for clarification rather than guessing.