After boarding, how does the No1 conduct the weight and balance headcount?

The weight and balance headcount conducted by the No1 is critical for ensuring the aircraft is balanced correctly and that the safety measures are adhered to during flight. The procedure typically focuses on specific rows within the cabin, taking into account where passengers are seated to accurately balance the load throughout the aircraft.

In this scenario, the correct approach is to count rows 1-5 and rows 29-33. This method allows the No1 to assess both the forward part of the cabin (which includes the first few rows where there may be a concentration of passengers) and the rear sections toward the end of the cabin that could potentially have a different passenger distribution. By concentrating on these specific rows, the No1 can efficiently gather the necessary information to report for weight and balance purposes without overwhelming the process.

The other options either propose counting sections that are too limited or too broad to achieve an effective balance check, thereby preventing an accurate representation of the overall passenger distribution required for optimal weight management. This systematic counting from key locations ensures that safety protocols are maintained throughout the flight.