In rope operations, what is the primary purpose of a tether line?

• A. To measure rope length during ascent.
• B. To serve as a backup communication line.
• C. To secure a rescuer or equipment to a fixed anchor for safety.
• D. To mark the route on the rock.

Answer: (C)

The main idea here is that a tether line provides a secure connection to a solid anchor, keeping the rescuer or equipment attached for safety. This tether acts as a personal or gear anchor, so if movement or loads shift, the line keeps everything secured and under control. It isn’t meant for measuring rope length, serving as a backup communication line, or marking a route, which is why securing to a fixed anchor for safety is the appropriate purpose.