Which of the following is a key responsibility of a Ramp Marshal?

The key responsibility of a Ramp Marshal is to direct aircraft movements. This role involves guiding aircraft during their taxiing and parking maneuvers on the ramp area, ensuring safe and efficient operations. The Ramp Marshal uses visual signals and communication to coordinate with pilots and ground crew, helping to prevent accidents and ensuring that all movements are performed in compliance with safety protocols.

In the context of airport operations, while controlling air traffic is crucial, that task is primarily the responsibility of air traffic controllers, who manage the airspace around the airport. Providing in-flight services pertains to cabin crew responsibilities and does not fit within the Ramp Marshal's duties. Additionally, managing flight schedules relates to operations personnel who handle flight planning and timetable issues, which again, falls outside the Ramp Marshal's scope of work. Thus, directing aircraft movements is the most accurate depiction of a Ramp Marshal's core responsibility.