What is the procedure during an operational inspection involving the aerial device?

Answer: B — Rotate the device while extended or retracted

The procedure during an operational inspection involving the aerial device emphasizes the importance of checking its functionality in both extended and retracted positions. Rotating the device while it is either extended or retracted allows the operator to assess the mechanical components and ensure that all parts are operating correctly without obstruction. This comprehensive approach helps identify potential issues that might not be visible when the device is stationary or in a single position, thus enhancing safety and operational readiness. Inspecting the device only when retracted would limit the evaluation of its operational capabilities, while keeping it stationary does not allow for a complete assessment of its movement and rotation features. Performing the inspection only on the ground would also restrict the operator's ability to deploy the device, preventing a thorough examination of its functionality in realistic conditions. Therefore, the procedure of rotating the device while extended or retracted is critical for ensuring overall safety and operational effectiveness.