To whom does No.2 give the cabin secure signal?

The cabin secure signal is a critical communication step in ensuring the safety and security of the aircraft during critical phases of flight, such as takeoff and landing. The No.2 crew member, who is typically responsible for overseeing specific cabin operations and assisting with crew coordination, gives the cabin secure signal to No.1, the lead flight attendant.

This signal is vital because No.1 is in charge of the cabin crew and is responsible for conveying information to the flight crew, including the Captain. By sending the signal to No.1, No.2 ensures that the lead crew member can confirm that the cabin is secure and relay this information up the chain of command to the Captain. This chain of communication is essential because it ensures that all safety protocols are adhered to, thereby enhancing the overall safety of the flight.

The other roles listed, including No.3, No.4, and the Captain, do not receive the cabin secure signal directly from No.2. Instead, the focus is on maintaining a streamlined line of communication that culminates with the Captain, who is ultimately responsible for the flight's safety.