What ensures the safety of team members at the edge of a high-angle rescue?

Travel restraint lines are crucial in ensuring the safety of team members at the edge of a high-angle rescue because they prevent a rescuer from inadvertently falling over the edge. These lines are typically anchored securely above the edge and are designed to limit the movement of the rescuer, ensuring they remain safely positioned while performing their duties.

In high-angle rescue scenarios, there is always a significant risk of falls due to the steepness of the terrain and the precarious nature of the operation. The use of travel restraint lines provides an additional layer of safety, allowing rescuers to focus on the task at hand without the distraction or danger of losing their footing or balance.

While effective communication, heavy lifting gear, and hydration systems are important aspects of overall safety and operational effectiveness, they do not specifically address the primary hazard posed by working at the edge of a height, which is the risk of falling. Thus, travel restraint lines stand out as the essential measure for protecting team members in these situations.