Referring to the illustration, what would be the result if the upper oil/water interface detection probe became faulty? Illustration GS-0175

Correct Answer: Option A — The unit would not be able to transition from ending the oil discharge mode to initiating the separation processing mode.

The oil/water interface probe monitors the separation process. If the probe fails to detect the interface, the control system cannot verify the completion of the oil discharge phase. Consequently, the logic prevents the transition to the separation mode to ensure the unit does not discharge untreated bilge water.