What is a full-body harness primarily used for in rescue operations?

A full-body harness is primarily used in rescue operations to fasten securely around the upper thighs, pelvis, torso, and shoulders, ensuring that the rescuer remains securely attached to a lifeline or anchor point. This configuration is essential for safety during various rescue scenarios, particularly in confined spaces where conditions may be unpredictable. The full-body harness's design allows for even distribution of weight and impact forces, reducing the risk of injury in the event of a fall.

In contrast, while securing tools during descent and providing stability while navigating are important in rescue operations, they are not the primary functions of a full-body harness. Tools can be secured through other means, such as tool belts or lanyards. Absorbing shock during falls is also a critical aspect of fall protection gear, typically associated with shock-absorbing lanyards rather than the harness itself. Therefore, the harness's primary role remains focused on safety and security for individuals involved in the rescue operation.