Engineering · Auxiliary — Separators
On an oily-water separator, the 15 ppm bilge alarm/oil-content monitor functions to:
- AMeasure the flow rate of clean water
- BDetect oil content and stop overboard discharge if it exceeds 15 ppm✓ Correct
- CHeat the bilge water
- DPump sludge ashore
Explanation
The oil-content monitor continuously samples the effluent; if oil exceeds 15 ppm it alarms and the three-way valve recirculates the water back rather than discharging overboard.
Authority: MARPOL Annex I; 33 CFR 155
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