In standby person duties, which option represents the standby role correctly?

• A. Enter tank
• B. Operate pumps
• C. Monitor personnel in tank
• D. Record readings

Answer: (C)

Standby duties are focused on safety and observation during confined-space entry. The person in standby stays outside the tank but in close communication with the entrant, watching for signs of distress, monitoring the atmosphere, and being ready to initiate rescue if conditions become unsafe. This protective, observational role is the reason monitoring personnel in the tank area is the best representation of standby duties—the emphasis is on oversight and readiness rather than performing tasks inside the tank like entering, operating pumps, or taking readings. Entering the tank would defeat the safety purpose of having a dedicated observer outside; operating pumps and recording readings are tasks aligned with the inside crew or instrument operators, not the standby role.