Blanks, Spool Pieces and Locked Valves on the Overboard Side

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Planned scope. Physical separation of the sludge system from overboard, the locking and sealing regime, and its documentation.

Regulatory anchor. MARPOL Annex I Reg 12.2, Reg 14

Cluster. Vessel types and marine machinery. Catalogued in research/kb-gap-analysis-depth.md.

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