4.3 Special purpose ships
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - Intact Stability (IS) Code - Intact Stability for All Types of Ships Covered by IMO Instruments – Resolution A.749(18) - Annex - Code on Intact Stability for all Types of Ships Covered by IMO Instruments - Chapter 4 - Special Criteria for Certain Types of Ships - 4.3 Special purpose ships

4.3 Special purpose ships

4.3.1 Application

 The provisions given hereunder apply to special purpose ships, as defined in 1.3.5, of not less than 500 tons gross tonnage. The Administration may also apply these provisions as far as reasonable and practicable to special purpose ships of less than 500 tons gross tonnage.

4.3.2 Stability criteria

 The intact stability of special purpose ships should comply with the provisions given in 3.1.2 except that the alternative criteria given in 4.5.6.2 which apply to offshore supply vessels may be used for special purpose ships of less than 100 m in length of similar design and characteristics.


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.