What is another name for a 'pig rig' used in rescue operations?

The term 'pig rig' refers to a specialized rescue setup that is often used in confined space scenarios to facilitate the safe retrieval of individuals. The notation 'piggy back system' accurately describes the configuration of this system, which typically involves one rescuer being secured to another individual or a rescue device, allowing for a more efficient extraction from the confined space.

This system is critical in circumstances where traditional lifting methods may be infeasible due to space constraints or the physical conditions of the environment, allowing rescuers to maintain control and safety for both the rescuer and the victim. The terminology used in the field is essential for effective communication among rescue personnel, and understanding that 'pig rig' and 'piggy back system' refer to the same setup is crucial for successful operations.

The other options reflect different components or techniques used in rescue, but they do not specifically indicate the specialized setup referred to as a pig rig, thereby distinguishing the piggy back system as the most appropriate synonym.