Engineering · Pollution — MARPOL
Under MARPOL Annex I, machinery-space bilge water discharged from a ship underway must generally pass through equipment ensuring the oil content does not exceed:
- A100 ppm
- B50 ppm
- C15 ppm✓ Correct
- D1 percent
Explanation
Oily bilge water must be processed through an oily-water separator with a 15-ppm bilge alarm; the effluent oil content must not exceed 15 parts per million for discharge outside special areas while proceeding en route.
Authority: MARPOL Annex I / 33 CFR 151
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