As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the units labeled "WCU" in the accommodations? EL-0096

Correct Answer: Option D — These are watch cabin units extending the alarm system to engineer staterooms vessels with periodically unmanned engine rooms.

Watch Cabin Units (WCU) are integral to periodically unmanned engine room (UMS) configurations. They extend the centralized alarm and monitoring system to engineer staterooms, ensuring that critical machinery faults are immediately communicated to the duty engineer, satisfying regulatory requirements for safe operation without continuous manual watchkeeping in the space.