What does the term "string line" mean in rigging?

The term "string line" in rigging refers to a straight line that serves as a reference for alignment and measurement. In rigging, establishing accurate alignments is crucial for ensuring that structures, equipment, or elements are positioned correctly and safely. A string line provides a linear reference point that helps riggers achieve precision in their work, whether they are setting up equipment, laying out a grid, or aligning components.

This is particularly important in various applications such as construction, landscaping, and event staging, where precise measurements can greatly affect the overall success of a project. By using a string line, riggers can visually and physically verify that items are straight and correctly positioned relative to one another, enhancing the accuracy and efficiency of their work.

The other options do not encompass the primary function of a string line. For instance, a curved line used for aerodynamic design pertains to different modeling processes, while a cord for hanging equipment doesn't provide alignment functionality. Likewise, measuring fuel levels relates to completely different equipment and techniques, not involving the alignment aspect that is characteristic of a string line's use in rigging.