How often should dispatchers actively monitor weather updates for ongoing flights?

Dispatchers should actively monitor weather updates continuously, especially during flight, because weather conditions can change rapidly and significantly impact flight safety and operations. Continuous monitoring allows dispatchers to provide timely and relevant updates to flight crews regarding in-flight weather conditions, potential turbulence, or other hazards that may develop. This proactive approach ensures that the flight crew has the most current information, allowing them to make informed decisions regarding routing, altitude changes, or any necessary diversions.

Keeping a constant watch on weather developments is essential because it enables dispatchers to act promptly if deteriorating conditions arise, ensuring both the safety of the aircraft and compliance with regulatory requirements. Continuous monitoring also ensures operational efficiency, as it allows dispatchers to communicate important updates that might affect arrival times or fuel management, optimizing overall flight performance.

The other options suggest less frequent or only specific timing for weather monitoring, which could compromise safety and affect decision-making in dynamic flight scenarios.