Which devices are commonly used for descending during a rescue?

Descending during a rescue operation requires specialized equipment designed to safely control the rate of descent and ensure the rescuer's stability. Descent devices, such as figure-8 devices and brake racks, are specifically engineered for this purpose. These devices provide a controlled way to manage friction during descent, allowing the user to regulate their speed while descending vertical surfaces. They also enhance safety by enabling quick stops and aiding in the extraction of individuals from various elevations.

In contrast, the other options do not offer the necessary features for safe descending in rescue scenarios. Climbing harnesses and pulleys are more about supporting weight and redirecting forces rather than controlling descent. Carabiners and quick-draws are used for securing connections and facilitating movement in climbing but lack the specific functionality needed for descending. Lastly, gliders and parachutes are designed for entirely different scenarios, focusing on free-fall descent and aerial maneuvers, which are not relevant for traditional rope rescue techniques.