All pilots flying internationally and all controllers dealing with international traffic must have a
minimum level of Aviation English. This is called ‘ ICAO Operational Level 4’.
According to our research (we have tested over 60,000 aviators from 150+ countries using Test of
English for Aviation – TEA), 60% of non-native English speaking aviators have ICAO Level 4 English
(34% have Level 5 and 6% have Level 6)
To improve aeronautical communication it’s important to understand what a Level 4 aviator can and
cannot do (linguistically).
This video helps to explain what we can expect from a Level 4 pilot or controller.
What does ICAO Level 4 mean?