What is a key consequence of poor ATC sequencing during departure and arrival?

• A. Increased risk of spacing violations and sequencing conflicts.
• B. Increased fuel efficiency.
• C. Faster touchdown.
• D. No impact on safety.

Answer: (A)

Maintaining safe, orderly air traffic flow hinges on ATC sequencing to keep departure and arrival streams properly spaced and prepared for clean, conflict-free transitions. When sequencing is poor, aircraft can end up too close in time or position or on paths that intersect in unsafe ways. That directly raises the risk of spacing violations—where required separations aren’t maintained—and sequencing conflicts, where the planned order or clearances would lead to conflicting tracks or altitudes. The result is a safety concern that can trigger holds, vectors, go-arounds, or other corrective actions to restore safe separation.

Fuel efficiency wouldn’t typically improve with bad sequencing; it often worsens due to extra holds, unnecessary vectors, and extended taxi or flight times. Faster touchdown isn’t a reliable outcome and can come at the cost of safety. Claiming there’s no impact on safety ignores the clear safety implications of compromised spacing and conflicting sequences.