On a ship with a periodically unmanned engine room, the duty engineer is responsible for making machinery space rounds when the engine room is unattended. How often should these machinery space rounds be performed by the duty engineer?

Correct Answer: Option C — Every four hours

Under UMS (Unattended Machinery Space) requirements, the duty engineer must perform routine rounds to ensure machinery integrity. Standard maritime practice and safety management systems dictate these rounds occur at least every four hours to verify operating parameters, check for leaks, and ensure the automation systems are functioning correctly.