3 Criteria for the floatability assessment
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1380 – Guidance for Watertight Doors on Passenger Ships Which May be Opened During Navigation – (10 December 2010) - Annex – Guidance for Watertight Doors on Passenger Ships Which may be Opened During Navigation - Appendix 1 – Procedure for The Determination of the Impact of Open Watertight Doors on Passenger Ships Survivability (Floatability Assessment) - 3 Criteria for the floatability assessment

3 Criteria for the floatability assessment

  3.1 For each assumed flooding case described in section 2, the floatability criteria described below should be met at the deepest subdivision draught at level trim. For this loading condition, the limiting KG or GM should be assumed in the calculations.

  • .1 The bulkhead deck may be immersed provided that no progressive flooding occurs (i.e. weathertight openings may not be immersed; only watertight openings may be immersed).

  • .2 The maximum positive righting lever should not be less than 0.05 m.

  • .3 The range of positive righting levers should not be less than 7°.

  • .4 The maximum equilibrium heel angle should not exceed 15°.

  3.2 The Administration may accept alternative methodologies if it is satisfied that at least the same degree of safety as represented by this procedure is achieved (reference is made to SOLAS regulation II-1/4.2).

Parent topic: Appendix 1 – Procedure for The Determination of the Impact of Open Watertight Doors on Passenger Ships Survivability (Floatability Assessment)
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