How much separation is required from the edge of airspace when radar separation is being used within a 40-mile radius from the radar?

The required separation from the edge of airspace when utilizing radar separation within a 40-mile radius from the radar is 1.5 miles. This separation is crucial to ensure safe and efficient operation within controlled airspace. The 1.5 miles buffer is designed to accommodate radar limitations and ensure that aircraft can maneuver safely without the risk of unintended proximity to the airspace boundaries.

In this context, the specific measurement of 1.5 miles provides the necessary cushion to handle potential discrepancies or inaccuracies in radar tracking, thereby enhancing overall safety for aircraft operating near the edges of radar coverage. Factors such as terrain, aircraft speed, and potential response times in communications also contribute to defining this buffer zone.

Understanding the importance of this separation is vital for air traffic controllers, as it aids in maintaining situational awareness and managing airspace more effectively, especially in busy airspace conditions where multiple aircraft are operating simultaneously.