What specific control must ground traffic instructions ensure on a runway or movement area?

Ground traffic instructions must ensure positive control with specific instructions to maintain the safety and efficiency of operations within the runway or movement area. This involves providing clear directives to aircraft and vehicles on where to move, when to hold, and any pertinent details regarding their movements. Positive control minimizes the risk of runway incursions or collisions, as each party involved in the operation is given unambiguous responsibilities and directions.

In the context of air traffic control, positive control means that the controller has a clear understanding of the movements occurring on the ground and can effectively manage the traffic flow. Specific instructions issued by the controller help eliminate ambiguity, ensuring that all pilots and ground personnel are aware of the exact movements required and expected, which enhances overall operational safety.

While clear communication of intent, real-time monitoring, and other systems may support ground traffic management, it is the provision of specific and positive control instructions that fundamentally underpins safe operations in these critical areas.