Deck General · Watertight Integrity
A watertight door in a main transverse subdivision bulkhead below the waterline should normally be kept:
- AOpen for ventilation
- BClosed only during drills
- COpen at sea, closed in port
- DClosed except when passing through✓ Correct
Explanation
Watertight doors in subdivision bulkheads are kept closed at sea to preserve subdivision and damage stability, opened only briefly for transit. Their status is logged and controllable from the bridge.
Authority: SOLAS Chapter II-1, Reg. 13/22 (watertight integrity)
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