The line labeled "E", as shown in the illustration, would be identified as the ______. GS-0175

Correct Answer: Option D — oily bilge water inlet line

Line (E) serves as the oily bilge water inlet line. It delivers the untreated bilge mixture from the bilge pump or holding tank into the separator vessel. Proper identification of this line is vital for system operation and maintenance, ensuring compliance with MARPOL and 46 CFR pollution prevention requirements.