The `s' factor to be used for this exercise only
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.574 – The Calculation Procedure to Assess the Survivability Characteristics of Existing Ro-Ro Passenger Ships When Using a Simplified Method Based Upon Resolution A.265(VIII) – (Adopted on 3 June 1991) - Annex - The Attained Subdivision Index 'A' for Existing Ro-Ro Passenger Ships - The Calculation Procedure to Assess the Survivability Characteristics of Existing Ro-Ro Passenger Ships When Using a Simplified Method Based Upon Resolution A.265(VIII) - The use of the probabilistic concept in assessing the residual stability standards of existing ro-ro passenger ships - The `s' factor to be used for this exercise only

The `s' factor to be used for this exercise only

 where:

  • GZmax is the maximum positive residual righting lever (m) within the range of 15° beyond the angle of equilibrium, but not more than 0.1 m;
  • Range is the range of positive righting levers beyond the angle of equilibrium, in degrees, but not more than 15°;
  • Area is the area under the righting lever curve (m.rad), measured from the angle of equilibrium to the lesser of the angles at which progressive flooding occurs, or 22° (measured from the upright) in the case of a one-compartment flooding, or 27° (measured from the upright) for the flooding of two or more adjacent compartments, but not more than 0.015 m.rad.
  • In respect of the `Area', please note that the allowable area is up to a heel angle, measured from the upright 22°/27°, depending on whether flooding of a single compartment or two adjacent compartments is concerned.

and c is determined according to the following:

c = 1 where the final angle of equilibrium θe is not more than 7°,
c = 0 where the final angle of equilibrium θe is not more than 20°, else

Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.