Aviation English (ICAO Level 4)
ICAO English Language Proficiency for pilots and air traffic controllers: Levels 4, 5 and 6, the six rating criteria, how often you re-test, and how to practise radiotelephony.
Every pilot and air traffic controller working international routes must hold an English language proficiency endorsement under ICAO Annex 1, at Operational Level 4 or above. The requirement exists because radio misunderstandings have caused accidents, so the test is built around the radio: can you understand a controller through static and an unfamiliar accent, respond with correct read-backs, and switch to plain English when a situation leaves the standard phrases behind?
The six criteria
Raters score pronunciation, structure, vocabulary, fluency, comprehension and interactions, and your level is the lowest of the six, not the average. That rule is what fails confident speakers: a pilot with Level 5 fluency and Level 3 comprehension of non-native controllers is a Level 3. Level 4 means you can handle routine work and most non-routine situations with some pauses and occasional errors that do not block meaning. Level 5 is extended fluency and comprehension across a wide range of situations. Level 6 is expert.
How often you re-test
A Level 4 endorsement is re-evaluated every three years and Level 5 every six years; Level 6 is normally not re-evaluated. The interval is set by your licensing authority under Annex 1, so for Indian licence holders it is the DGCA's English Language Proficiency scheme, for others their own civil aviation authority. There is no single global calendar: tests are booked on demand at approved centres, and the format varies by provider. Use the upcoming exam dates page for the tests with fixed dates and your authority's approved-provider list for this one.
What the test looks like
Most approved tests combine a listening section of recorded radio exchanges, a role-play in which you are the pilot or controller handling a non-routine event (a sick passenger, a bird strike, a go-around, a lost communication), picture description of an aviation scene, and an interview about your work. The non-routine role-play is where the plain-English demand peaks: you must describe, request and confirm without the comfort of standard phraseology, under time pressure, to a rater who may interrupt.
How to practise
Standard phraseology you already know; practise the moment it runs out. Take one abnormal scenario a day and talk it through aloud as a transmission: situation, intention, request, read-back. Then describe an aviation photograph for two minutes using precise vocabulary (nose gear, taxiway, holding point, windshear) instead of "the thing". Listen to recordings of controllers from regions whose accents you find hardest and shadow them. On TalkDrill, run the scenario as a timed spoken role-play with an AI partner who asks you to clarify, and check the intonation drills for the stress patterns that make read-backs easy to understand. Our cabin crew interview guide covers the airline interview side for crew.