What signal indicates that the hoist trolley should be moved laterally?

The signal that indicates the hoist trolley should be moved laterally is the trolley travel signal. This signal is specifically designed to communicate to the operator that the trolley needs to move along the beam or track to facilitate the movement of the load in a horizontal direction.

Using the trolley travel signal helps ensure efficient operation during material handling, allowing lineworkers and operators to coordinate their efforts safely and effectively. In contrast, the other signals listed are meant for different types of operations, such as lowering a load or hoisting, which do not apply to lateral movement of the hoist trolley. Understanding the correct signals and their applications is crucial for maintaining safety and efficiency during rigging and hoisting tasks.