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What Are the 4 Levels of Disruptive Passenger Behaviour?
Level 1 is disruptive behaviour - verbal aggression, refusing crew instructions, intoxication.
Level 2 is physically abusive behaviour.
Level 3 is life-threatening.
Level 4 is an attempted or actual breach of the flight crew compartment.
This is the ICAO "4 Levels of Threat" framework, often referred to simply as the ICAO threat levels, adopted internationally to give flight crews, airlines and police a shared language for how serious an incident actually is.
The overwhelming majority of real incidents sit at Level 1 - verbal, not physical - which is exactly where early, confident de-escalation makes the biggest difference. That's the focus of our Conflict Management & Personal Safety course for transport staff: recognising a Level 1 situation and responding at the earliest stage, rather than waiting to see where it goes.
Knowing the framework is one thing; knowing what to actually do in the moment is the harder skill.
For Transport Staff
Stop It at Level 1
Most incidents never go beyond verbal aggression. Our Conflict Management & Personal Safety course gives transport staff the de-escalation skills to keep it that way.
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