When should use of another controller's airspace be coordinated for an aircraft under your control?

When should use of another controller's airspace be coordinated for an aircraft under your control?

• A. Before Entering the Other Controller's Airspace
• B. After Entering the Other Controller's Airspace
• C. Only After a Pilot Request
• D. Prior to Entering the Other Controller's Airspace

Answer: (D)

Coordinating before entering another controller’s airspace ensures a safe and smooth handoff by giving the receiving controller advance information about the aircraft. When you’re about to cross the boundary, you provide essential details—who the aircraft is, its current position, altitude, speed, intended route, and any anticipated altitude or heading changes. This lets the next controller assess traffic in their sector, assign or confirm a handoff, and establish who is responsible for separation as the aircraft enters their airspace. This proactive step prevents last‑minute changes that could lead to confusion or conflicts and supports efficient flow management. Waiting until after entry (or relying on a pilot to request coordination) can lead to delays or gaps in clearance and increased risk of conflicting instructions. Therefore, coordination is performed prior to entering the other controller’s airspace.

Coordinating before entering another controller’s airspace ensures a safe and smooth handoff by giving the receiving controller advance information about the aircraft. When you’re about to cross the boundary, you provide essential details—who the aircraft is, its current position, altitude, speed, intended route, and any anticipated altitude or heading changes. This lets the next controller assess traffic in their sector, assign or confirm a handoff, and establish who is responsible for separation as the aircraft enters their airspace. This proactive step prevents last‑minute changes that could lead to confusion or conflicts and supports efficient flow management.

Waiting until after entry (or relying on a pilot to request coordination) can lead to delays or gaps in clearance and increased risk of conflicting instructions. Therefore, coordination is performed prior to entering the other controller’s airspace.