List one primary responsibility of the ground crew during sling load operations.

During sling load operations, one of the primary responsibilities of the ground crew is to ensure the safety and security of the load. This is crucial because the integrity of the load affects not only the success of the operation but also the safety of both the ground crew and the airborne personnel. The ground crew is tasked with properly securing the load to prevent it from shifting or falling during transport, which could create hazardous situations once the helicopter is in flight. Ensuring that the load is stable, balanced, and securely attached prevents accidents that can result from a loose or improperly secured load. This responsibility is vital in maintaining both operational efficiency and safety protocols during such complex maneuvers.