In a non-radar environment, what must be ensured when a departure takes off before the arrival leaves a fix inbound?

• A. The departure takes off after the arrival
• B. The departure takes off before the arrival leaves a fix inbound
• C. The takeoff direction is less than 45 degrees
• D. Both aircraft are on different runways

Answer: (B)

In a non-radar environment, coordinating the timing of departures and arrivals is crucial for maintaining safety and separating aircraft. Ensuring that a departure takes off before an arrival leaves a fix inbound is essential for several reasons.

First, this procedure helps maintain vertical and horizontal separation between the two aircraft. By allowing the departure to take off while the arrival is still some distance away from its final approach fix, you can guarantee that they are not on a collision course. This timing ensures that both aircraft are adequately spaced, minimizing the risk of an incursion into the same airspace.

Moreover, this protocol adheres to standard separation criteria used in air traffic control, where it is necessary to maintain safe distances between aircraft to avoid potential conflicts. When the departure is airborne before the arrival crosses the fix, it allows for predictable flight paths and mitigates the need for immediate maneuvers or altitude changes that could lead to complexity in the situation.

Additionally, the other choices present scenarios that could compromise safety or do not align with the standard practices in managing departures and arrivals. For instance, ensuring that the takeoff direction is less than 45 degrees or that both aircraft are on different runways might offer some separation but do not address the timing and sequencing issue critical in non