{"id":19119,"date":"2026-02-16T10:59:25","date_gmt":"2026-02-16T09:59:25","guid":{"rendered":"https:\/\/icao4u.com\/?p=19119"},"modified":"2026-02-13T12:25:56","modified_gmt":"2026-02-13T11:25:56","slug":"standard-vs-non-standard-phraseology-level-4-vs-6","status":"publish","type":"post","link":"https:\/\/icao4u.com\/pl\/standard-vs-non-standard-phraseology-level-4-vs-6\/","title":{"rendered":"Standard vs Non-Standard Phraseology: ICAO Level 4 vs Level 6 Guide | ICAO4U"},"content":{"rendered":"<h1 class=\"wp-block-heading\" id=\"h-standard-vs-non-standard-phraseology-differences-between-icao-level-4-and-level-6\">Standard vs Non-standard Phraseology &#8211; differences between ICAO Level 4 and Level 6<\/h1>\n\n\n\n<p><a href=\"https:\/\/icao4u.com\/pl\/icao-standard-phraseology-aviation-safety\/\">In the previous post you learnt about the importance of ICAO Standard English Phraseology and its influence on Aviation Safety &#8211; click here to check it!<\/a><\/p>\n\n\n\n<p>The safety takeaway from the article is that <strong>Most aviation accidents are not caused by lack of English \u2014 but by lack of standard English<\/strong> and that:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>If a message is important, it must be standard.<\/strong><\/p>\n\n\n\n<p><strong>If it is not standard, it must be clear.<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-251\">By all means, it is not about sounding professional \u2014 it is about being understood correctly, every time <sup><\/sup>.<\/p>\n\n\n\n<p>In this article, we would like to show you, though, that &#8220;Standard&#8221; is Not &#8220;Optional&#8221; and even if we use standard, there are differences between how we express ourselves, how we convey the messages and how clear they are for our listeners. The more advanced your language, the higher your ICAO LEVEL.<\/p>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-252\">In an emergency, the human brain tends to revert to its native language or &#8220;plain English.&#8221; Training in ICAO phraseology creates muscle memory. By making the language &#8220;robotic,&#8221; aviation professionals ensure that even under extreme stress or oxygen deprivation (hypoxia), the communication remains functional and unambiguous <sup><\/sup>.<\/p>\n\n\n\n<p>Let\u2019s look at the practical comparison examples between <strong>ICAO LEVEL 4 vs LEVEL 6<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-routine-situation-taxi-clearance-confusion\">1. ROUTINE SITUATION \u2014 TAXI CLEARANCE CONFUSION<\/h3>\n\n\n\n<p><strong>Situation<\/strong><\/p>\n\n\n\n<p>The pilot is unsure about the assigned taxi route.<\/p>\n\n\n\n<p><strong>ICAO LEVEL 4<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cUh\u2026 we are not sure about the taxiway. Can you say again?\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Meaning is understandable<\/li>\n\n\n\n<li>Hesitation and filler words<\/li>\n\n\n\n<li>Limited precision<\/li>\n\n\n\n<li>Reactive, not proactive<\/li>\n\n\n\n<li>\u2611 Operationally acceptable<\/li>\n\n\n\n<li>\u274c Not polished or safety-optimal<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO LEVEL 6<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cConfirm taxi route to holding point runway two seven via Alpha.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clear and concise<\/li>\n\n\n\n<li>Correct structure<\/li>\n\n\n\n<li>No ambiguity<\/li>\n\n\n\n<li>Uses standard phraseology<\/li>\n\n\n\n<li>\u2611 High situational awareness<\/li>\n\n\n\n<li>\u2611 Professional and efficient <\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-abnormal-situation-weather-avoidance\">2. ABNORMAL SITUATION \u2014 WEATHER AVOIDANCE<\/h3>\n\n\n\n<p><strong>Situation<\/strong><\/p>\n\n\n\n<p>Pilot needs deviation due to weather.<\/p>\n\n\n\n<p><strong>ICAO LEVEL 4<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cWe have weather ahead and need to go a little right.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Message is clear<\/li>\n\n\n\n<li>Non-standard phrasing<\/li>\n\n\n\n<li>Vague distance and intent<\/li>\n\n\n\n<li>\u2611 Message understood<\/li>\n\n\n\n<li>\u274c Limited detail<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO LEVEL 6<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cRequest ten degrees right for weather avoidance.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Specific<\/li>\n\n\n\n<li>Standard ICAO structure<\/li>\n\n\n\n<li>Predictable phrasing<\/li>\n\n\n\n<li>\u2611 Easier for ATC to respond<\/li>\n\n\n\n<li>\u2611 Reduced misunderstanding <\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-non-standard-situation-unable-clearance\">3. NON-STANDARD SITUATION \u2014 UNABLE CLEARANCE<\/h3>\n\n\n\n<p><strong>Situation<\/strong><\/p>\n\n\n\n<p>Pilot cannot comply with altitude clearance.<\/p>\n\n\n\n<p><strong>ICAO LEVEL 4<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cWe cannot climb now because the aircraft is too heavy.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Meaning clear<\/li>\n\n\n\n<li>Extra words<\/li>\n\n\n\n<li>Informal explanation<\/li>\n\n\n\n<li>\u2611 Acceptable<\/li>\n\n\n\n<li>\u274c Inefficient<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO LEVEL 6<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cUnable to climb due to aircraft performance.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Short and standard<\/li>\n\n\n\n<li>Correct use of \u201cunable\u201d<\/li>\n\n\n\n<li>Professional register<\/li>\n\n\n\n<li>\u2611 Ideal ICAO response <\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-emergency-related-technical-problem-no-mayday\">4. EMERGENCY-RELATED \u2014 TECHNICAL PROBLEM (NO MAYDAY)<\/h3>\n\n\n\n<p><strong>Situation<\/strong><\/p>\n\n\n\n<p>Minor technical issue, no immediate danger.<\/p>\n\n\n\n<p><strong>ICAO LEVEL 4<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cWe have a small problem with the engine but it is okay.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vague<\/li>\n\n\n\n<li>Reassuring but unclear<\/li>\n\n\n\n<li>Poor information quality<\/li>\n\n\n\n<li>\u274c Risk of misunderstanding<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO LEVEL 6<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cWe have an engine indication abnormality, request to maintain present level.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Precise<\/li>\n\n\n\n<li>Non-emotional<\/li>\n\n\n\n<li>Action-oriented<\/li>\n\n\n\n<li>\u2611 Supports ATC decision-making <\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-accident-incident-discussion-exam-picture-task\">5. ACCIDENT \/ INCIDENT DISCUSSION (EXAM PICTURE TASK)<\/h3>\n\n\n\n<p><strong>Situation<\/strong><\/p>\n\n\n\n<p>Candidate describes an aircraft damaged after runway excursion.<\/p>\n\n\n\n<p><strong>ICAO LEVEL 4<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cThe plane is damaged and it went out of the runway. Maybe the weather was bad.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Basic description<\/li>\n\n\n\n<li>Limited vocabulary<\/li>\n\n\n\n<li>Simple speculation<\/li>\n\n\n\n<li>\u2611 Minimum acceptable<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO LEVEL 6<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cThe aircraft appears to have overshot the runway after landing. The damage suggests a loss of directional control, possibly influenced by contaminated runway conditions.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Accurate observation<\/li>\n\n\n\n<li>Controlled speculation<\/li>\n\n\n\n<li>Safety-focused language<\/li>\n\n\n\n<li>\u2611 Examiner-level response <\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-6-crm-decision-making-question\">6. CRM \/ DECISION-MAKING QUESTION<\/h3>\n\n\n\n<p><strong>Situation<\/strong><\/p>\n\n\n\n<p>Crew discussion after unstable approach.<\/p>\n\n\n\n<p><strong>ICAO LEVEL 4<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cWhy did you continue? It was not stable.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Direct but confrontational<\/li>\n\n\n\n<li>Limited CRM tone<\/li>\n\n\n\n<li>\u26a0 Understandable, but risky<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO LEVEL 6<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cWhat factors influenced the decision to continue the approach?\u201d<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Neutral<\/li>\n\n\n\n<li>CRM-appropriate<\/li>\n\n\n\n<li>Encourages discussion<\/li>\n\n\n\n<li>\u2611 Ideal for safety culture <\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-7-key-differences-quick-exam-summary\">7. KEY DIFFERENCES \u2014 QUICK EXAM SUMMARY<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Feature<\/strong><\/td><td><strong>ICAO Level 4<\/strong><\/td><td><strong>ICAO Level 6<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Clarity<\/strong><\/td><td>Adequate<\/td><td>Precise<\/td><\/tr><tr><td><strong>Vocabulary<\/strong><\/td><td>Limited<\/td><td>Aviation-specific<\/td><\/tr><tr><td><strong>Structure<\/strong><\/td><td>Basic<\/td><td>Predictable<\/td><\/tr><tr><td><strong>Fluency<\/strong><\/td><td>Some hesitation only<\/td><td>Natural &amp; controlled<\/td><\/tr><tr><td><strong>CRM tone<\/strong><\/td><td>Neutral \/ direct<\/td><td>Professional &amp; non-blaming<\/td><\/tr><tr><td><strong>Safety impact<\/strong><\/td><td>Acceptable<\/td><td>Optimal<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-259\"><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-part-2-adaptation-for-atc\">PART 2 \u2014 ADAPTATION FOR ATC<\/h2>\n\n\n\n<p>Now let\u2019s reuse the same structure, but shift the perspective.<\/p>\n\n\n\n<p><strong>(Controller \u2194 Pilot)<\/strong><\/p>\n\n\n\n<p><strong>Key difference<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pilots:<\/strong> compliance + clarification<\/li>\n\n\n\n<li><strong>ATC:<\/strong> clarity, sequencing, anticipation<\/li>\n<\/ul>\n\n\n\n<p><strong>Pilot:<\/strong> \u201cRequest taxi.\u201d<\/p>\n\n\n\n<p><strong>ICAO LEVEL 4 ATC:<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cTaxi to runway two seven.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p>\u26a0 <strong>Issues:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>missing holding point<\/li>\n\n\n\n<li>no taxi route<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO LEVEL 6 ATC:<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cTaxi to holding point runway two seven via Alpha.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-260\">\u2611 Complete \u2611 Predictable \u2611 Safe <sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-atc-specific-marking-additions\">ATC-SPECIFIC MARKING ADDITIONS<\/h3>\n\n\n\n<p><strong>1. INFORMATION STRUCTURE (CRITICAL FOR ATC)<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Correct but incomplete clearances<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Complete, sequenced, unambiguous<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Listen for:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>runway number included<\/li>\n\n\n\n<li>route included<\/li>\n\n\n\n<li>restrictions included <\/li>\n<\/ul>\n\n\n\n<p><strong>2. ANTICIPATION &amp; MONITORING<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Reacts to pilot requests<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Anticipates pilot needs<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Example:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Level 6 ATC adds: \u201cExpect further clearance at holding point.\u201d <\/li>\n<\/ul>\n\n\n\n<p><strong>3. ERROR TRAPPING<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Corrects errors when obvious<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Detects incorrect readbacks immediately<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-263\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-atc-incident-discussion-for-example-picture-task\">ATC INCIDENT DISCUSSION (for example PICTURE TASK)<\/h3>\n\n\n\n<p><strong>ICAO Level 4<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cThe aircraft is damaged. Maybe it\u2019s the pilot\u2019s mistake.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p>\u274c Blame-focused<\/p>\n\n\n\n<p>\u274c Weak safety value<\/p>\n\n\n\n<p><strong>ICAO Level 6<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cThe image shows significant nose damage. Runway conditions and operational factors may have contributed.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p>\u2611 System thinking<\/p>\n\n\n\n<p>\u2611 Professional neutrality<\/p>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-264\"><strong>ATC EXAMINER GOLDEN RULE<\/strong> A Level 6 controller does not just give clearances \u2014 <strong>they manage traffic through language.<\/strong> <sup><\/sup><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-commonly-misunderstood-phrases-in-aviation\">Commonly Misunderstood Phrases in Aviation<\/h2>\n\n\n\n<p>Here is a breakdown of commonly misunderstood phrases, the risks they carry, and the ICAO Standard equivalents that keep the skies safe.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-roger\">1. \u201cRoger\u201d<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cRoger\u201d (used to mean yes \/ cleared \/ will do)<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Does NOT mean compliance<\/li>\n\n\n\n<li>Has caused aircraft to enter runways or descend without clearance<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use \u201cWilco\u201d \u2192 I understand and will comply<\/li>\n\n\n\n<li>Or full readback of the clearance<\/li>\n<\/ul>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-265\"><strong>Example (safe):<\/strong> \u201cCleared to land runway two seven, ABC123.\u201d <sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-okay-alright\">2. \u201cOkay\u201d \/ \u201cAlright\u201d<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cOkay, descending.\u201d<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Informal<\/li>\n\n\n\n<li>No legal meaning<\/li>\n\n\n\n<li>Can hide misunderstanding<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use \u201cDescending\u201d, \u201cClimbing\u201d, \u201cMaintaining\u201d<\/li>\n<\/ul>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-266\"><strong>Example:<\/strong> \u201cDescending to flight level one zero zero.\u201d <sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-takeoff-used-incorrectly\">3. \u201cTakeoff\u201d (used incorrectly)<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cReady for takeoff.\u201d<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Correct only when actually clearing for takeoff.<\/li>\n\n\n\n<li>Runway incursions<\/li>\n\n\n\n<li>Fatal accidents (e.g. Tenerife)<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Before clearance: \u201cReady for departure\u201d<\/li>\n\n\n\n<li>Clearance: \u201cCleared for takeoff\u201d (only ATC) <\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-at-your-discretion\">4. \u201cAt your discretion\u201d<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cDescend at your discretion.\u201d (without limits)<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Different interpretations<\/li>\n\n\n\n<li>Uncontrolled descent profiles<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Always include a limit<\/li>\n<\/ul>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-268\"><strong>Example:<\/strong> \u201cDescend at pilot\u2019s discretion to flight level one eight zero.\u201d <sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-as-soon-as-possible\">5. \u201cAs soon as possible\u201d<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cClimb as soon as possible.\u201d<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Subjective timing<\/li>\n\n\n\n<li>Conflicting expectations between pilot and ATC<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use specific instructions<\/li>\n<\/ul>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-269\"><strong>Example:<\/strong> \u201cClimb now to flight level two four zero.\u201d <sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-6-continue-approach-amp-landing\">6. \u201cContinue\u201d (Approach &amp; Landing)<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cContinue.\u201d<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pilot may interpret as landing clearance<\/li>\n\n\n\n<li>Contributed to approach and runway accidents<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u201cContinue approach\u201d<\/li>\n\n\n\n<li>\u201cCleared to land\u201d only when appropriate <\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-7-stand-by\">7. \u201cStand by\u201d<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cStand by.\u201d (no follow-up)<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pilot waits indefinitely<\/li>\n\n\n\n<li>Critical time lost in abnormal situations<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use sparingly and re-contact quickly<\/li>\n\n\n\n<li>Or give conditional instruction <\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-8-we-are-good-no-problem\">8. \u201cWe are good\u201d \/ \u201cNo problem\u201d<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cEverything is good now.\u201d<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hides technical or operational issues<\/li>\n\n\n\n<li>ATC loses situational awareness<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>State status clearly<\/li>\n<\/ul>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-272\"><strong>Example:<\/strong> \u201cTechnical issue resolved, able to continue.\u201d <sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-9-can-you-instead-of-request\">9. \u201cCan you\u2026?\u201d instead of \u201cRequest\u2026\u201d<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cCan you give us lower?\u201d<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sounds informal<\/li>\n\n\n\n<li>Weakens urgency<\/li>\n\n\n\n<li>Unclear operational intent<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u201cRequest lower altitude.\u201d <\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-10-i-think-maybe-probably\">10. \u201cI think \/ maybe \/ probably\u201d<\/h3>\n\n\n\n<p>\u274c <strong>Common misuse:<\/strong> \u201cI think we are on the wrong taxiway.\u201d<\/p>\n\n\n\n<p><strong>Risk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hesitation<\/li>\n\n\n\n<li>Delayed corrective action<\/li>\n<\/ul>\n\n\n\n<p><strong>ICAO Standard:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u201cConfirm taxiway.\u201d<\/li>\n\n\n\n<li>\u201cWe may be on incorrect taxiway.\u201d <\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-summary-table-training-friendly\">Summary Table (Training-Friendly)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Non-Standard Phrase<\/strong><\/td><td><strong>Risk<\/strong><\/td><td><strong>ICAO-Standard Equivalent<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Roger<\/strong><\/td><td>No compliance<\/td><td>Wilco \/ readback<\/td><\/tr><tr><td><strong>Okay<\/strong><\/td><td>Informal<\/td><td>Descending \/ Climbing<\/td><\/tr><tr><td><strong>Ready for takeoff<\/strong><\/td><td>Runway incursion<\/td><td>Ready for departure<\/td><\/tr><tr><td><strong>As soon as possible<\/strong><\/td><td>Ambiguity<\/td><td>Climb now<\/td><\/tr><tr><td><strong>Continue<\/strong><\/td><td>Landing confusion<\/td><td>Continue approach<\/td><\/tr><tr><td><strong>Can you\u2026<\/strong><\/td><td>Weak request<\/td><td>Request\u2026<\/td><\/tr><tr><td><strong>We\u2019re good<\/strong><\/td><td>Hidden risk<\/td><td>Status stated clearly<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-275\"><\/p>\n\n\n\n<p>For your information, please find more comparisons between level 4 and 6.<\/p>\n\n\n\n<p><strong>Task type:<\/strong> Routine \/ non-routine operational exchange<\/p>\n\n\n\n<p><strong>1. PRONUNCIATION<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Accent noticeable but intelligible; occasional repetition required, misunderstandings occurred<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Clear, natural pronunciation; no effort required to understand, no misunderstandings<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>2. STRUCTURE &amp; PHRASEOLOGY<\/strong><\/p>\n\n\n\n<p>The examiner listens for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>correct verb use (request, confirm, unable)<\/li>\n\n\n\n<li>correct number format<\/li>\n\n\n\n<li>proper readbacks<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Meaning clear, but wording sometimes non-standard, non-standard but acceptable<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Consistent use of ICAO phraseology and correct structure, standard and precise<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>3. FLUENCY<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Some hesitation, fillers, reformulation, hesitation affects flow<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Smooth delivery, appropriate pace, natural operational rhythm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>4. COMPREHENSION &amp; INTERACTION<\/strong><\/p>\n\n\n\n<p>Key check: Does the candidate target missing information?<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Responds correctly after clarification, vague clarification<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Anticipates, clarifies proactively, precise clarification<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>5. SAFETY IMPACT (Examiner Judgment)<\/strong><\/p>\n\n\n\n<p>Final examiner note: Does the candidate\u2019s language support safe operations under pressure?<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Communication adequate but not optimized<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Communication actively reduces risk<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>PICTURE DESCRIPTION \/ INCIDENT DISCUSSION<\/strong><\/p>\n\n\n\n<p><strong>1. DESCRIPTION ACCURACY<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Describes main elements, limited detail, observations mixed with assumptions<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Accurate, structured, relevant details, observations clearly separated<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>2. SPECULATION CONTROL<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Uses \u201cmaybe\u201d, \u201cI think\u201d frequently, uncontrolled speculation<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Uses controlled phrases (appears to, suggests), professional speculation<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>3. VOCABULARY RANGE<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>General aviation terms<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Precise technical vocabulary<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>4. CRM \/ SAFETY TONE<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Level<\/strong><\/td><td><strong>Examiner indicators<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>4<\/strong><\/td><td>Neutral, sometimes direct, personal judgment language<\/td><\/tr><tr><td><strong>6<\/strong><\/td><td>Non-blaming, system-focused, safety-system language<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-overall-icao-decision-support\">OVERALL ICAO DECISION SUPPORT<\/h3>\n\n\n\n<p><strong>Examiner guidance:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Level 4<\/strong> = meaning achieved<\/li>\n\n\n\n<li><strong>Level 6<\/strong> = risk managed through language<\/li>\n<\/ul>\n\n\n\n<p id=\"p-rc_2527e7d3be6d5a19-276\">Follow us for more differences between levels and requirements you must meet to reach level 5 or 6. <sup><\/sup><\/p>","protected":false},"excerpt":{"rendered":"<p>Standard vs Non-standard Phraseology &#8211; differences between ICAO Level 4 and Level 6 In the previous post you learnt about the importance of ICAO Standard English Phraseology and its influence on Aviation Safety &#8211; click here to check it! The safety takeaway from the article is that Most aviation accidents are not caused by lack&hellip;&nbsp;<a href=\"https:\/\/icao4u.com\/pl\/standard-vs-non-standard-phraseology-level-4-vs-6\/\" rel=\"bookmark\">Dowiedz si\u0119 wi\u0119cej &raquo;<span class=\"screen-reader-text\">Standard vs Non-Standard Phraseology: ICAO Level 4 vs Level 6 Guide | ICAO4U<\/span><\/a><\/p>","protected":false},"author":622,"featured_media":19120,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[1],"tags":[291,287,289,288,290,292],"class_list":["post-19119","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bez-kategorii","tag-atc-phraseology","tag-aviation-english-exam","tag-icao-exam-preparation","tag-level-4-vs-level-6","tag-pilot-interview","tag-plain-english-vs-standard"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.8 (Yoast SEO v25.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>ICAO Level 4 vs Level 6: Key Differences Explained - ICAO4U - ICAO Exam online<\/title>\n<meta name=\"description\" content=\"Explore the differences between ICAO Level 4 and Level 6 in aviation communication and their impact on safety. 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