6 Intact stability
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.608/Rev.1 – Interim Guidelines for Open-top Containerships – (Adopted on 5 July 1994) - Annex - Interim Guidelines for Open-Top Containerships - 6 Intact stability

6 Intact stability

  6.1 The stability of the ship in all conditions of loading should meet the provisions of the Code of Intact Stability for All Types of Ships Covered by IMO Instruments.

  6.2 Where cargo hold freeing ports are fitted, they should be considered closed for the purpose of determining the flooding angle, provided that the reliable and effective control of closing of these freeing ports is satisfactory to the Administration.

  6.3 With all open holds completely filled with water (permeability of 0.70 for container holds) to the level of the top of the hatch side or hatch coaming or, in the case of a ship fitted with cargo hold freeing ports, to the level of those ports, the stability of the fully laden ship in the intact condition should meet the survival criteria (with factor s = 1) of chapter II-1 part B-1 of SOLAS 1974, as amended.

  6.4 For the condition with flooded holds and an intact ship the free surfaces may be determined as follows: The holds are fully loaded with containers. The seawater enters the containers and will not pour out during heeling. This condition should be simulated by defining the amount of water in the containers as fixed weight items. The free space surrounding the containers is then flooded with seawater. This free space should be evenly distributed over the full length of the open cargo holds.

  6.5 Intermediate conditions of hold flooding should be investigated.


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