Who is responsible for informing the captain when the baggage identification process is completed?

The correct answer highlights the crucial role of the first officer (often referred to as NO1, or "number one") in the cockpit crew hierarchy. When it comes to airline operations, the first officer is tasked with various responsibilities that include ensuring communication between the ground staff and the flight crew. Once the baggage identification process is completed, it is essential for the first officer to inform the captain of this development. This communication ensures that the captain is aware that all baggage has been properly accounted for, which is critical for safety and operational efficiency before takeoff.

The responsibilities of the other roles do not involve this specific communication duty. The ground staff may be executing the baggage identification checks, passengers typically do not play a part in operational communications with the flight crew, and while baggage handlers are essential for managing luggage, they do not directly communicate with the flight crew regarding the identification process. Therefore, the accumulation of these duties confirms the first officer's responsibility in keeping the captain informed about the baggage status.