How many passenger information signs are required for aircraft with a capacity of 10 or more?

For aircraft with a capacity of 10 or more passengers, regulations require at least one passenger information sign to ensure safety and effective communication during flight operations. This sign typically conveys essential information regarding safety procedures, emergency exits, and other important instructions that passengers may need to know.

Having a minimum of one sign is a standard requirement to promote passenger awareness and safety. It acts as a critical tool in helping passengers understand their responsibilities and the actions they should take in the event of an emergency. This sign should ideally be positioned where it is easily visible to all passengers, contributing to a safer cabin environment.

Regarding the other options, having no signs would not meet safety regulations, and insisting on two or more signs might imply redundancy without necessity unless specified by other factors like aircraft design or operational requirements. Thus, one sign is determined to be sufficient for compliance, ensuring clarity and effectiveness in communication with passengers.