Which alert indicates an off-airfield crash with limited hazard and no fire?

The alert indicating an off-airfield crash with limited hazard and no fire is indeed Alert 5. This classification is specifically designed for situations where an aircraft has encountered an incident but is not posing a significant danger to the public or the environment, largely due to the absence of fire.

Alert 5 provides a structured response for emergency crews to ensure that they can mobilize resources appropriately while also preparing for potential escalation should conditions change. Given that the incident occurs off the airfield and there is no fire, the alert signifies a relatively controlled situation that requires monitoring and readiness without the immediate need for aggressive firefighting measures.

Understanding the distinctions among the different alerts is crucial for effective emergency response, as each level signifies varying degrees of risk and necessary action, allowing responders to tailor their approach based on the specifics of the incident.