What is the minimum distance to maintain from an obstacle when using a marshaler or wing walker?

The correct minimum distance to maintain from an obstacle when using a marshaler or wing walker is 5 feet. This standard is established to ensure safety during ground operations. Maintaining this distance helps to prevent accidents by providing enough space for maneuverability and reducing the risk of collision with the obstacle. This distance allows for the safe operation of the aircraft while the marshaler or wing walker guides the pilot, ensuring that both personnel and equipment remain safe from potential hazards.

Options presenting greater distances such as 10 feet, 15 feet, or 3 feet would either unnecessarily complicate ground operations or inadequately provide safety margins that are deemed necessary in the standard operating procedures for marshaling aircraft.