Radio Phraseology

Standard Calls

Phase	Pilot says
Initial call	[Station] [Callsign] [Position] [Level] [Request]
Read-back	Repeat all clearances, altimeter, and runway
Level report	“Passing [FL/ALT], climbing/descending [FL/ALT]”

Key Words

WILCO — Will comply
ROGER — Received (no compliance implied)
AFFIRM / NEGATIVE — Yes / No
STANDBY — Wait, I will call you
SAY AGAIN — Please repeat
CORRECTION — Error, correct version follows

Distress & Urgency

	Prefix	Condition
Distress	MAYDAY × 3	Grave & imminent danger
Urgency	PAN-PAN × 3	Urgent, not immediate danger

Both on 121.500 MHz if no contact.

Frequency Change

“Changing to [freq], [callsign]”
New station: “[Station] [Callsign] [level] [request]”

ICAO Doc 9835 / EU No 923/2012

Radio Unicornlines