What is the appropriate action when you see a passenger standing up during taxi?

The appropriate action in this scenario is to ask the passenger to return to their seat. This is crucial for ensuring passenger safety during taxiing. When an aircraft is taxiing, it is essential that all passengers remain seated with their seatbelts fastened to prevent injury in the event of unexpected stops or movements.

While advising the passenger that the seatbelt is on is important, it is more effective to directly ask them to return to their seat. This not only reinforces safety procedures but also helps maintain the order and discipline necessary within the aircraft during taxiing. It is essential for all passengers to be seated and properly secured to comply with safety regulations and to reduce the risk of accidents or injuries. Ignoring the action would compromise safety protocols, and notifying the captain is generally reserved for more severe situations or concerns, rather than routine compliance with seatbelt regulations.