The outer limit of the control zone shall not be established closer than ____ nm to any airway, controlled airspace, or special use airspace, unless approved by cognizant authority?

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Multiple Choice

The outer limit of the control zone shall not be established closer than ____ nm to any airway, controlled airspace, or special use airspace, unless approved by cognizant authority?

The main idea is that a standard 10 nautical mile buffer is required to keep the outer limit of the control zone from intruding on other airspace. This spacing prevents overlap with airways, controlled airspace, or special use airspace, reducing the chance of conflicts at the boundary and giving air traffic services a predictable point for transitioning traffic. It also helps ensure safe separation as aircraft move between en route and terminal areas near airports. The cognizant authority can approve a different distance if there are operational needs, but 10 NM is the typical standard. Distances like 5, 15, or 20 NM don’t align with that standard: 5 NM would be too tight, while 15 or 20 NM would unnecessarily enlarge the boundary and complicate airspace structure.

The main idea is that a standard 10 nautical mile buffer is required to keep the outer limit of the control zone from intruding on other airspace. This spacing prevents overlap with airways, controlled airspace, or special use airspace, reducing the chance of conflicts at the boundary and giving air traffic services a predictable point for transitioning traffic. It also helps ensure safe separation as aircraft move between en route and terminal areas near airports. The cognizant authority can approve a different distance if there are operational needs, but 10 NM is the typical standard. Distances like 5, 15, or 20 NM don’t align with that standard: 5 NM would be too tight, while 15 or 20 NM would unnecessarily enlarge the boundary and complicate airspace structure.

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