Which of the following is a requirement before moving ground equipment?

Before moving ground equipment, ensuring that it is disconnected is crucial for several safety reasons. When equipment, such as tugs or belt loaders, is connected to an aircraft or another piece of equipment, moving it could result in damage, compromise the integrity of the aircraft’s systems, or create a hazardous situation for ground crew and personnel nearby. Disconnection also ensures that any potential for accidental activation of systems is eliminated, which is especially important around aircraft where safety is paramount.

Additionally, while servicing the equipment, checking for debris, and obtaining clearance from the pilot are all important practices to maintain safety and operational standards, they do not specifically address the immediate concerns related to the movement of equipment itself. Thus, ensuring disconnection directly addresses the potential risks involved in moving ground equipment.