How are the types of parallel runways classified based on their proximity?

The classification of parallel runways based on their proximity is correctly identified as Close, Intermediate, Far, and Dual. This classification provides a clear framework for understanding how parallel runways are positioned in relation to one another, which is critical in the context of airport operations and air traffic management.

• Close runways are those that are situated near each other, typically allowing for simultaneous use under specific conditions and air traffic control procedures.

• Intermediate runways are farther apart than close runways but still maintain a reasonable proximity that facilitates efficient operations, particularly with the use of advanced air traffic control measures.

• Far runways are those that are significantly spaced apart, often requiring separate air traffic control approaches during flight operations and taking full advantage of the available airspace.

• Dual runways refer to an operational setup where two parallel runways are used together, allowing for maximum efficiency and increased air traffic capacity.

Understanding these classifications is essential for aviation professionals in maintaining safety and efficiency in runway operations. The other options do not accurately reflect the conventional terms used to describe the proximity of parallel runways, thus reinforcing the correctness of this classification scheme.