Which two positions must remain near the e-stop switch during winch up and flight time?

The correct response highlights the critical roles of the AC (Attraction Coordinator) and the controller during winch up and flight time. Both positions are essential because they are responsible for the safe operation of the Skycoaster during these high-stakes moments. The AC oversees the entire operation and ensures that all safety protocols are followed, while the controller manages the mechanics and the immediate environment surrounding the Skycoaster's operation.

Having the AC and controller near the emergency stop switch ensures quick access to halt the operation immediately if any issues arise. This proximity is vital for maintaining safety and responding to unexpected situations during the flight and winching processes. Other positions, while important in their own right, do not have the same immediate need for access to the e-stop switch during these critical operational phases.