What is a messenger line used for in high line operations?

A messenger line is specifically used in high line operations to facilitate the movement of other lines across a span. This line allows rescuers to pull other ropes, such as a main haul line or a tag line, across a distance where direct access may not be feasible. The primary purpose of the messenger line is to act as an intermediary that enables the deployment of these essential lines without requiring personnel to traverse the entire span.

In high line scenarios, efficient communication and timely setup of lines are crucial for safety and effectiveness. The messenger line streamlines this process, ensuring that additional lines can be safely and efficiently delivered where needed, which is essential for any rescue operation involving a high line setup.