Engineering · Pollution — Oily Water Separator
A 15 ppm bilge alarm fitted to an oily-water separator (OWS) is required to:
- AStop the main engine
- BPrevent/alarm and stop overboard discharge when the effluent exceeds 15 parts per million of oil✓ Correct
- CMeasure exhaust opacity
- DTest fuel sulfur
Explanation
Machinery-space bilge water may be discharged overboard only through a 15 ppm separator with an oil-content monitor and automatic stopping device that prevents discharge above 15 ppm. Discharges are logged in the Oil Record Book.
Authority: MARPOL Annex I, Regulation 14; 33 CFR 155
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