Who gives the instruction to "drop the loop" when there is slack in the rope?

The instruction to "drop the loop" when there is slack in the rope is given by the AC, or Aerial Coordinator. The AC is responsible for overseeing the flow of operations during the ride and ensuring the safety and proper conduct of the flight. When slack occurs in the rope, it's crucial for a designated authority like the AC to issue commands to ensure that the operation proceeds smoothly and safely. This command helps in managing the tension required for the ride to function correctly.

The role of the AC is vital, as they are typically the most directly involved with the mechanics and safety protocols governing the ride's operations. Other personnel, such as the head operator, ground crew, and flight coordinator, have their own responsibilities, but the decision-making in regards to responding to changes in the rope's tension primarily falls to the AC.