When the visibility is 6/5/6, what determines if departure is allowed?

When considering the visibility of 6/5/6, the determination of whether a departure is allowed primarily hinges on airport-specific takeoff minimums. Each airport has established minimum visibility requirements that must be met for a safe takeoff, which are influenced by various factors such as runway length, lighting, traffic management, and the specific type of operations being conducted.

These minimums ensure that pilots have adequate visual reference during the initial climb phase after takeoff, especially in instances where navigational aids might not provide sufficient support. Thus, regardless of other factors such as weather conditions on the route or type of aircraft being used, the specific regulations set by the airport play a crucial role in ensuring safety. For example, some airports may have stricter visibility requirements due to terrain or air traffic density, making it essential for pilots to be aware of these airport-specific rules before departure.