Who is used whenever clearance to any obstacles is less than 10 feet or vision is restricted?

The role of a wing walker is crucial in maintaining safety during ground operations, particularly when aircraft are maneuvering in close proximity to obstacles or in conditions of restricted visibility. Wing walkers are specifically tasked with ensuring that there is adequate clearance between the aircraft and any nearby obstacles, which is essential to prevent accidents or damage.

When clearance to any obstacles is less than 10 feet, the risk of collision significantly increases, making it imperative to have personnel dedicated to monitoring the situation. The wing walker is positioned at the wingtip of the aircraft to provide real-time guidance and assistance to the flight crew, signaling when it is safe to proceed or when adjustments are necessary. This proactive measure enhances safety during taxiing and other ground movements.

Other roles mentioned, such as the ground crew, safety officer, and ground controller, each have distinct functions within airport operations, but they do not specifically focus on the immediate hazard assessment relating to aircraft clearance and the visual obstruction that a wing walker actively manages. Thus, the wing walker is the designated individual responsible for maintaining safety in situations where clearance is critical.