If self-evaluation of an entrant is not possible, what should be used for safety?

The use of an extraction device ensures that if a confined space presents dangerous conditions, the entrant can be safely removed. This equipment is designed specifically for retrieval in emergency situations, providing a critical safety measure when a self-evaluation by the entrant isn't feasible. It helps facilitate quick extraction without requiring the entrant to assess their ability to exit the space themselves, which could be vital in life-threatening situations where time is of the essence.

Verbal checklists, emergency alarms, and monitoring systems all play important roles in confined space safety as well; however, they serve different functions. A verbal checklist helps assess conditions prior to an entry, emergency alarms alert personnel to dangers, and monitoring systems provide real-time data about the atmosphere within the space. However, none of these options provide immediate physical assistance to safeguard an entrant who may be incapacitated or overwhelmed. The extraction device stands out as it enables a physical means of safety and assurance for the entrant's prompt retrieval from the confined environment.