Tankerman · Ballast — Segregated
Segregated ballast tanks (SBT) are:
- ATanks that carry cargo and ballast alternately
- BBallast tanks completely separated from the cargo and fuel systems✓ Correct
- CSlop tanks for oily residues
- DTanks used only for fresh water
Explanation
SBT have their own piping and pumps and never contact cargo oil, so ballast water can be discharged without oil contamination. Required on larger tankers to reduce operational pollution.
Authority: MARPOL Annex I (segregated ballast); 33 CFR 157
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