Phraseology

Definition

Phraseology in aviation refers to the use of standardized, internationally recognized words and expressions for radiotelephony communication between pilots and air traffic control (ATC). It ensures clarity, brevity, and precision, reducing the risk of misunderstandings and enhancing safety—especially in high workload, multilingual, or emergency situations.
Phraseology is defined by ICAO (Annex 10, Doc 9432) and is implemented nationally by aviation authorities (e.g., Austro Control, DFS, FAA).

Purpose

  • Provide clear, concise communication during all phases of flight
  • Minimize language barriers and ambiguity
  • Support non-native English speakers with predictable terminology
  • Enhance situational awareness for all parties on frequency
  • Enable efficient traffic management, especially in complex or congested airspace

Core Principles of Standard Phraseology

  • ✅ Say only what is necessary
  • ✅ Use predefined words and formats
  • ✅ Avoid slang, regional accents, or casual expressions
  • ✅ Repeat critical elements (callsign, runway, heading, altitude, frequency)
  • ✅ Use numbers properly (e.g., “two thousand five hundred” not “twenty-five hundred”)

Common Phraseology Examples

SituationPhraseology
Initial contact“Wien Tower, OE-ABC, at holding point runway 29, ready for departure.”
Climb clearance“Climb flight level eight zero.”
Descent“Descend to altitude three thousand feet QNH one zero one six.”
Heading assignment“Turn left heading two four zero.”
Frequency change“Contact Salzburg Radar on one two five decimal five.”
Taxi instruction“Taxi to holding point runway 27 via Alpha and Bravo.”
Traffic report“Traffic twelve o’clock, five miles, opposite direction, same level.”

Numerical Phraseology

NumberSay As
1,000“One thousand”
5,500“Five thousand five hundred”
80“Eight zero” (flight level)
1013 (QNH)“One zero one three”
121.875 (frequency)“One two one decimal eight seven five”

Avoid phrases like:
❌ “Twenty-five hundred”
✅ “Two thousand five hundred”

Special Terms and Abbreviations

TermMeaning
WilcoWill comply
RogerReceived and understood
NegativeNo / not approved
StandbyWait, I will call you back
Squawk XXXXSet transponder code XXXX
Break / Break BreakSeparates different messages / urgent priority
Mayday / Pan PanEmergency / Urgency call

Language Rules

  • English is the international standard language for ATC phraseology
  • National language (e.g., German) may be used for domestic VFR operations unless otherwise required
  • Pilots must adhere to the language listed in their radiotelephony license

Incorrect vs. Correct Examples

IncorrectCorrect
“Okay, we're good to go.”“Ready for departure runway 27.”
“Can you give me a left turn?”“Request left turn.”
“I guess that's runway 09.”“Confirm runway 09.”
“We’re pushing back now.”“Request pushback.”

Tips for Pilots

  • ✅ Practice standard phraseology regularly—even on solo flights
  • ✅ Listen carefully before transmitting
  • ✅ Always read back clearances, runway instructions, and altitudes
  • ✅ Use LearnATC's live radio simulations to build confidence in real-world phraseology use






We use cookies and localStorage to ensure app functionality. Read more in our Privacy Policy

Decline