Which signal is indicated when the load must be hoisted and then moved horizontally?

The correct answer is indicated by the necessity to raise the boom while hoisting the load, which is a standard practice when there is a need to lift a load straight up before moving it horizontally. This procedure allows for safe clearance and positioning of the load without risking contact with obstacles or the lifting equipment itself during the transition.

Raising the boom while lowering the load ensures that the lifting mechanism maintains control over the load, facilitating a smooth and safe horizontal movement once the load has reached the desired height. This method is essential for maintaining stability and avoiding any potential hazards, particularly when dealing with heavy or awkwardly shaped loads.

In this scenario, options that signify lowering the load or stopping all operations do not support the requirement for lifting before horizontally moving the load. Additionally, adjusting the rigging is not necessary unless there’s a specific reason to modify the rigging setup after the load has been hoisted, which wouldn’t directly address the requirement to move the load horizontally after lifting it.