Which of the following is NOT counted as a passenger on board the aircraft?

Lap-held infants are indeed not counted as passengers on board the aircraft. When calculating the number of passengers for safety and regulatory purposes, airlines typically consider only those individuals who occupy a specific seat. Lap-held infants, who are under the age of two, do not have a seat of their own; rather, they are held on an adult's lap throughout the flight. This policy allows airlines to accommodate more individuals while maintaining compliance with safety regulations.

On the contrary, passengers in child restraint seats are counted since they occupy a designated seating area. Similarly, deadheading crew members, who are airline employees traveling for operational purposes, are also counted as passengers since they occupy seats. Cabin crew members using jump seats are not counted in the passenger total, but they do not affect the passenger count in the same way as lap-held infants. Understanding these distinctions is crucial for compliance with safety regulations and awareness of how passenger and crew counts are managed aboard aircraft.