What term describes passengers who can walk and board the aircraft unassisted?

The term that accurately describes passengers who can walk and board the aircraft unassisted is "ambulatory." This designation is specifically used for individuals who have the ability to move about freely and manage their own mobility without the need for assistance from others. In the context of aviation, it is important for airlines and crew members to identify ambulatory passengers to ensure that appropriate seating arrangements and safety procedures are established, particularly in emergencies.

On the other hand, non-ambulatory refers to passengers who are unable to walk or require assistance to move, incapacitated typically describes individuals who are not able to function normally due to a medical condition, and disabled often encompasses a broader category that includes various types of mobility impairments or other conditions that may restrict movement. Understanding these distinctions is crucial for airport and airline staff to provide the right support and resources for all passengers.