Chapter 2 – Stability and Subdivision
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Statutory Documents - IMO Publications and Documents - International Codes - 2008 SPS Code – Code of Safety for Special Purpose Ships, 2008 – Resolution MSC.266(84) - Chapter 2 – Stability and Subdivision

Chapter 2 – Stability and Subdivision

  2.1 The intact stability of special purpose ships should comply with the provisions of section 2.5 of Part B of the 2007 Intact Stability Code.

  2.2 The subdivision and damage stability of special purpose ships should in general be in accordance with SOLAS chapter II-1 where the ship is considered a passenger ship, and special personnel are considered passengers, with an R-value calculated as follows:

  • .1 where the ship is certified to carry 240 persons or more, the R-value is assigned as R;

  • .2 where the ship is certified to carry not more than 60 persons, the R-value is assigned as 0.8R; and

  • .3 for more than 60 (but not more than 240) persons, the R-value should be determined by linear interpolation between the R-values given in .1 and .2 above.

Where:

N = N1 + 2N2

N1 = number of persons for whom lifeboats are provided

N2 = number of persons (including officers and crew) the ship is permitted to carry in excess of N1

 2.3 Where the conditions of service are such that compliance with paragraph 2.2 above on the basis of N = N1 + 2N2 is impracticable and where the Administration considers that a suitably reduced degree of hazard exists, a lesser value of N may be taken but in no case less than N = N1 + N2.

  2.4 For special purpose ships to which 2.2.1 applies, the requirements of SOLAS regulations II-1/8 and II-1/8-1 and of SOLAS chapter II-1, parts B-2, B-3 and B-4 should be applied as though the ship is a passenger ship and the special personnel are passengers. However, SOLAS regulations II-1/14 and II-1/18 are not applicable.

  2.5 For special purpose ships to which 2.2.2 or 2.2.3 applies, except as provided in 2.6, the provisions of SOLAS chapter II-1, parts B-2, B-3 and B-4 should be applied as though the ship is a cargo ship and the special personnel are crew. However, SOLAS regulations II-1/8 and II-1/8-1 need not be applied and SOLAS regulations II-1/14 and II-1/18 are not applicable.

  2.6 All special purpose ships should comply with SOLAS regulations II-1/9, II-1/13, II-1/19, II-1/20, II-1/21 and II-1/35-1, as though the ship is a passenger ship.


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