In what scenario would you use a tag line?

Using a tag line is primarily associated with controlling the position of a load during hoisting. A tag line is a rope or line that is attached to a load which allows the operator to guide or stabilize the load as it is lifted, ensuring that it moves safely and predictably. This practice is particularly important in avoiding swinging or uncontrolled motions that can occur during lifting, which could pose safety risks to personnel and equipment below.

When properly used, a tag line enables the operator to maneuver the load effectively, especially in situations where visibility is limited or where precision in placement is crucial. This level of control helps maintain safety on site by minimizing the risk of accidents due to unexpected load movements.

The other options, while they may involve related concepts, do not accurately describe the primary purpose of a tag line. Measuring the weight of a load, marking safe zones, and navigating obstacles are tasks that involve different tools and techniques, not specifically related to the function of a tag line in hoisting operations.