Predictive wind shear alert systems can warn flight crews of potential wind shear up to how many miles ahead?

Predictive wind shear alert systems are designed to provide timely warnings to flight crews about potential wind shear, which is a significant change in wind speed and direction over a short distance. These systems utilize advanced technology, including radar and atmospheric data, to assess the conditions that could lead to wind shear events.

The ability to warn flight crews up to 3 miles ahead is a key feature of these systems. This distance allows pilots enough time to respond appropriately, either by adjusting their approach or take-off strategies or implementing other safety measures. The 3-mile range is significant because it strikes a balance between early warning and the practical limitations of predicting wind shear as conditions can change rapidly.

This capability is critical for enhancing safety during critical phases of flight, especially during takeoff and landing when aircraft are most vulnerable to wind shear. Other options, while smaller distances, do not provide the comprehensive safety margin that the 3-mile alert system offers, reinforcing its importance in modern aviation safety protocols.