Which type of control is essential for ensuring load stability during transport?

Implementing tag lines is essential for ensuring load stability during transport because they allow riggers to maintain control over the load as it is being moved. Tag lines are ropes attached to the load that can be used to guide and stabilize it, minimizing swaying and shifting. This is particularly important in environments where precise load positioning is critical, as it helps to prevent accidents and ensures the safety of both personnel and equipment.

Using boom rests, while beneficial for supporting the load when stationary, does not contribute to stability during transport. Outriggers are important for providing stability to the crane or lifting equipment itself but do not directly affect the load's stability during movement. Ensuring that a load is balanced is a significant factor in load handling, but using tag lines directly aids in controlling the load's movement and ensuring it remains stable, which is vital during transport operations.