What is the main role of No1 during boarding/disembarking procedures?

The main role of No1 during boarding and disembarking procedures is to ensure the smooth and organized management of passenger flow, which includes stopping passengers from entering the aircraft until it is their turn to board. This responsibility is crucial for maintaining order and safety during the boarding process. By controlling the entry, No1 prevents congestion and ensures that passengers adhere to the boarding sequence, allowing for a more efficient and timely departure.

The other roles mentioned, such as handling passenger inquiries and preparing meal service, do not fall under the primary responsibilities of No1 during these specific procedures, as the focus is primarily on managing the boarding and disembarking process to ensure a safe and efficient operation.