In the ICAO English Language Proficiency test, the Operational Level (Level 4) is the minimum required standard for pilots and air traffic controllers engaged in international operations. Achieving Level 4 demonstrates a functional command of aviation English, allowing the speaker to communicate safely and effectively in most routine and non-routine situations. Here’s how each of the six proficiency criteria is marked at the Operational Level:

1. Pronunciation

  • Marking at Operational Level: Pronunciation is generally clear and mostly understandable, though a noticeable accent may sometimes interfere with clarity. Intonation and stress patterns are adequate to be understood by native and non-native listeners, though slight effort may be required in certain situations.

2. Structure (Grammar and Sentence Construction)

  • Marking at Operational Level: The speaker demonstrates a sufficient command of basic grammatical structures and sentence patterns. While they can use simple and some complex sentences accurately, errors in more advanced grammar may occur. These errors do not generally hinder comprehension or safety but may limit precision.

3. Vocabulary

  • Marking at Operational Level: Vocabulary is adequate for routine and some non-routine aviation situations. The speaker can express themselves on familiar and work-related topics, though there may be occasional hesitation or simplifications. Vocabulary use may lack flexibility, and word choice may not always be precise, especially in complex scenarios.

4. Fluency

  • Marking at Operational Level: Speech flow is generally steady, though there may be occasional pauses, self-corrections, or hesitations. The speaker can handle most communication demands, though they may slow down in more challenging or unexpected situations. Overall fluency allows for functional communication, though it may lack spontaneity.

5. Comprehension

  • Marking at Operational Level: Comprehension is generally accurate for routine and some non-routine situations, but the speaker may occasionally need clarification or repetition, particularly when faced with fast or complex speech. They can generally understand and respond to work-related instructions, though their understanding may be tested in highly complex or unfamiliar contexts.

6. Interactions

  • Marking at Operational Level: Interaction is functional and effective. The speaker can initiate, maintain, and conclude exchanges, even in unexpected situations. They may occasionally need to clarify or repeat but can generally manage conversational flow, respond appropriately, and use basic strategies to ensure effective communication.

Overall Scoring at Operational Level (Level 4)

To achieve the Operational Level (Level 4), a speaker must show competence across all six criteria. They should demonstrate the ability to communicate effectively in routine aviation situations and handle non-routine situations with some support. Minor limitations may exist—such as slight hesitations, minor grammar or vocabulary issues, or occasional misunderstandings—but these do not significantly interfere with overall safety or operational communication.

The Operational Level is the minimum requirement for pilots and air traffic controllers who operate in international airspace. This level of proficiency ensures that they can manage standard communication tasks and resolve some non-routine situations effectively, maintaining clear and safe exchanges with ATC, crew, and other parties.