What is a tag line used for in rigging?

A tag line is a vital tool in rigging, used primarily to control the load during lifting and lowering operations. When a load is lifted, especially in outdoor environments or in areas with wind, it can easily sway or spin, making it more difficult to maneuver safely. The tag line is a rope that is attached to the load and allows the rigger or operator to stabilize and guide the load as it is being lifted or lowered. This control helps ensure that the load stays oriented correctly and prevents any unintended movements that could lead to accidents or injuries.

In contrast, the other options describe functions that are not the primary role of a tag line. For instance, while attaching safety cables to the load is important for securing the load itself, this duty falls outside the typical use of a tag line. Measuring the distance of a lift involves more precise equipment specifically designed for that purpose, such as tape measures or other measuring devices, rather than a tag line. Lastly, signaling crane operators during emergencies is generally conducted through hand signals or communication devices, not through the use of tag lines, which are focused primarily on load control.