How quickly can the BAK-15 arresting system lower the net to avoid obstructing landing aircraft?

The BAK-15 arresting system is designed for quick deployment and retraction to ensure safe landings for aircraft. The correct answer indicates that it can lower the net in as little as three seconds, which is crucial for maintaining the safe landing environment. This rapid lowering mechanism allows for quick clearance of the runway after an aircraft has landed, making it possible for subsequent flights to land without delay. The efficiency of the BAK-15 system in achieving this task within a short time frame is essential for air traffic management, particularly in busy operational environments where minimizing downtime is critical for safety and efficiency. Other time options, such as five, two, and four seconds, are either too long or too short compared to the established capability of the BAK-15, making three seconds the optimal and correct choice.