Under which of the listed conditions can the engine room retake the throttle control from the bridge of an automated vessel?

Correct Answer: Option D — Any time it is deemed necessary.

In USCG Marine Electrical Systems (IEEE 45 and 46 CFR), regarding 'Under which of the listed conditions can the engine room retake the throttle control from the bridge of an automated vessel', the compliant technical standard is: 'Any time it is deemed necessary.'.