During night operations, can chem lights be attached to a rappel rope?

The correct response asserts that chem lights should not be attached to a rappel rope. This ruling primarily focuses on safety and the practical implications of using chem lights during night operations. When attaching lights to a rappel rope, there is a risk of interference with the rope's integrity and functionality. Chem lights, designed to provide illumination, can potentially create a hazard if they become snagged or impact the rappelling process.

Additionally, attaching items to a rappel rope can complicate descent and may obscure the climber's or rappeller's ability to navigate effectively. Providing unobstructed lines of descent is crucial for ensuring safety when conducting night operations. The other options imply conditions under which it might be acceptable to attach chem lights, which do not align with best practices in maintaining equipment integrity and operational safety.