Question #26:

Moscow airspace is a congested one. Why so?

Answer:

Moscow airspace is highly congested because it serves as a major hub with four international airports (Sheremetyevo, Domodedovo, Vnukovo, and Zhukovsky) operating in close proximity. Additionally, military zones and restricted areas further limit the available airspace. This congestion requires meticulous coordination between air traffic control and flight crews to prevent near‑misses and collisions.