On a MODU, a door that is required to be marked "KEEP CLOSED" is designed to __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — maintain watertight integrity
Doors designated as 'KEEP CLOSED' on MODUs are engineered structural closures vital for preserving subdivision bulkheads, thereby ensuring the vessel maintains its required watertight integrity against progressive flooding during damage control.
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