Referring to the illustration, note that the solenoid in line "C" is closed. The check valve in line "E" is open. The separator service pump is running. The check valve in line "G" is closed. Valve "B" is open. Valve "D" is closed. What is the operational status of the oily-water separator unit? Illustration GS-0175

Correct Answer: Option D — The oily-water separator is in the bilge water separation processing mode with water discharging overboard with an oil content less than 15 ppm.

With valve B open and D closed, the system directs processed water through the overboard discharge line. Since the separator is in processing mode and the check valve G is closed, the system is configured for compliant overboard discharge, maintaining oil content below the 15 ppm limit required by MARPOL.