What does the term "reduced separation" refer to in air traffic control?

The term "reduced separation" in air traffic control refers to decreasing the distance between aircraft. This practice is often applied in busy airspace where air traffic controllers implement specific procedures that allow aircraft to operate in closer proximity to one another than standard separation criteria would typically allow. The reduced separation can enhance the efficiency of air traffic flow and optimize the use of available airspace.

However, it's important to note that reduced separation is only applied when certain safety conditions and criteria are met, which may involve advanced surveillance technology, specific weather conditions, or when aircraft are adhering to certain operational protocols. The aim is to maintain safety while increasing capacity, which is crucial in high-traffic environments. Other options related to altitude differences or communication do not pertain to the core definition of reduced separation as understood within the context of air traffic management.