When an aircraft is expected at an aerodrome, what must the commander inform if there’s a change of destination?

The commander is required to inform the authorities at the aerodrome as soon as possible if there is a change of destination. This requirement is critical for several reasons. Firstly, it ensures that emergency services and air traffic control at the new destination are prepared for the arrival of the aircraft. This advance notice helps maintain safety and efficiency at the aerodrome, as crews can make necessary preparations, including securing landing rights and managing any special landing or taxing requirements.

Additionally, notifying the relevant authorities allows for better coordination of air traffic, especially if the new destination is managing a busy airport with other incoming flights. This timely communication can help prevent any potential traffic conflicts or safety concerns.

While keeping the cabin crew and passengers informed is important, the primary responsibility lies with the commander's duty to air traffic safety and compliance, hence the importance of informing local authorities promptly. The option regarding the ground staff at the original departure point is less critical in this scenario since it's the destination authorities who need to be aware of the aircraft's change in plans.