Which areas does the No3 check following a ditching?

In the context of the No3 check following a ditching, the focus is on specific areas of the aircraft that need to be inspected for safety and operational integrity. The correct answer highlights the necessity of checking Rows 11-20 and the AFT toilet. This area is significant because it encompasses essential passenger seating and facilities that may be impacted during an emergency situation like a ditching.

Rows 11-20 are typically located in a segment of the cabin where the flight attendants need to ensure that passengers are accounted for, any potential hazards are addressed, and that the environment is safe following an emergency scenario. The AFT toilet check is also crucial, as it ensures that all facilities are functional and safe after the aircraft has come to a stop in water, which can pose unique challenges in terms of accessibility and cleanliness.

The reasoning behind the focus on these specific rows and the AFT toilet is rooted in safety protocols that prioritize passenger welfare and the operational integrity of the aircraft immediately after such an incident, ensuring that all necessary steps are taken to protect the passengers and crew.