Which level corresponds to major hub airports?

• A. Level A - major hubs
• B. Level B - larger hubs
• C. Level C - augmented tower controllers
• D. Level D - completely automated

Answer: (A)

Major hub airports are the busiest and most complex to manage, requiring the highest level of staffing, coordination, and infrastructure. That’s why they sit at Level A. The other levels describe progressively less busy or more automated setups: Level B for larger hubs, Level C for augmented tower operations to handle higher workloads, and Level D for fully automated systems. So Level A best matches major hub airports.