3.6.4 External openings
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Statutory Documents - IMO Publications and Documents - International Codes - 1979 MODU Code – Code for the Construction and Equipment of Mobile Offshore Drilling Units – Resolution A.414(XI) - Chapter 3 – Subdivision, Stability and Freeboard - 3.6 Watertight integrity - 3.6.4 External openings

3.6.4 External openings

  .1 Where watertight integrity is dependent on external openings which are used during the operation of the unit, while afloat, they should comply with the following:

  • .1 Openings, the lower edges of which are not to be submerged, include air pipes (regardless of closing appliances), ventilators, ventilation intakes and outlets, non-watertight hatches and doorways not fitted with watertight closing appliances; and

  • .2 Openings such as manholes fitted with close bolted covers, small hatchesfootnote and sidescuttles of the non-opening type may be submerged.

  .2 The requirements of 3.6.3.2 should apply where the watertight integrity is dependent on external openings which are permanently closed during the operation of the unit, while afloat.

Parent topic: 3.6 Watertight integrity
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