Takeoff and Landing Weather Minima

Understanding Takeoff and Landing Weather Minima

Weather minima define the lowest visibility and cloud ceiling conditions under which a takeoff or landing may legally and safely occur. These values are specified for each aerodrome and approach procedure, considering factors like available approach aids, runway lighting, and aircraft category.

Takeoff Weather Minima

• Takeoff minima are primarily based on runway visual range (RVR) or meteorological visibility. For commercial operations, EASA regulations set strict minimums, often higher than those for landing, to ensure a safe abort option if needed. Operators may impose higher minima based on their own risk assessments and training standards.

Landing Weather Minima

• Landing minima are published for each approach procedure and depend on the type of approach (e.g., ILS, non-precision, circling), aircraft category, and runway equipment. The key elements are decision altitude/height (DA/H) and required RVR or visibility. If actual or forecast conditions are below these minima, a landing cannot be attempted, and an alternate must be considered.

Application in Flight Planning

• Pilots must check METARs and TAFs for departure, destination, and alternate aerodromes, ensuring weather meets the required minima for the planned time of operation. If not, the flight must be delayed, rerouted, or canceled. These checks are a fundamental part of pre-flight preparation and ongoing in-flight decision-making.

Regulatory and Operational Considerations

• EASA takeoff and landing minima are binding, but state-specific or operator-specific minima may apply. Always use the most restrictive value. Understanding how to interpret and apply these minima is essential for safe, legal, and efficient flight operations.