Which AIP section provides upper airspace structure?

Which AIP section provides upper airspace structure?

• A. ENR 2.2
• B. ENR 2.1
• C. ENR 3.2
• D. ENR 1.8

Answer: (A)

Understanding how the AIP organizes en-route information helps pinpoint where upper airspace details live. The ENR part covers en-route data used for planning and routing, and within that, the subsection dedicated to the upper airspace structure is the one you consult for the high‑altitude layout—how the airspace above a country is divided, where upper airways run, and how the upper sector boundaries are arranged. That specific focus is why ENR 2.2 is the best answer for upper airspace structure. Other ENR subsections address different en-route topics, so they don’t provide the upper airspace structure in the same precise way.

Understanding how the AIP organizes en-route information helps pinpoint where upper airspace details live. The ENR part covers en-route data used for planning and routing, and within that, the subsection dedicated to the upper airspace structure is the one you consult for the high‑altitude layout—how the airspace above a country is divided, where upper airways run, and how the upper sector boundaries are arranged. That specific focus is why ENR 2.2 is the best answer for upper airspace structure. Other ENR subsections address different en-route topics, so they don’t provide the upper airspace structure in the same precise way.