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logo Class News No. 39/2013

19 December, 2013
Statutory Alert: New SOLAS Regulation II-1/8-1 – operational information for masters of passenger ships regarding safe return to port
Applicability: Shipowners, ship operators and loading instrument manufacturers


SOLAS Regulation II-1/8-1 has been amended and will require operational information to be provided to the master after a flooding casualty to assist with decisions regarding safe return to port. The new requirement applies to passenger vessels over 120m in length or with three or more main vertical zones, constructed on or after 1 January, 2014.
The operational information can be provided by onboard stability computers or through shore-based support arrangements, as follows.
Onboard stability computers
If the ship is complying with the regulation using onboard stability computers, the following requirements apply:

  • At least two independent stability computers capable of processing the data and providing the necessary information should be installed on board. 
  • The computers must be approved in accordance with the guidelines contained in circular MSC.1/Circ.1400 and their output should be within the tolerances specified in the Guidelines for the Approval of Stability Instruments (MSC. 1/Circ. 1229). 
  • The computers should have an uninterruptible power supply (UPS) connected to both main and emergency switchboards. 
  • At least two crew members should be competent in operating the computers and capable of interpreting the output in order to provide the required information. 
Amendments to the IACS Unified Requirement UR L5, to incorporate minimum requirements for onboard stability computer safe return to port calculations, are under consideration. Minimum survivability standards may be left to the discretion of the ship’s flag administration. The procedure for loading computer approvals will be reviewed once the revised UR L5 has been issued.

Shore-based support
As an alternative to onboard stability computers, shipowners can arrange shore-based support which provides prompt access to computerised damage stability and residual structural strength calculation programs.
Shore-based support can be provided by Lloyd’s Register’s ship emergency response service (SERS), the largest emergency response service provider, with over 3,000 vessels registered, including more than 100 passenger and cruise ships. Both LR and non-LR classed vessels can enrol with the service. To find out more, contact
Shore-based support may be considered complementary to onboard arrangements, with immediate response on board being followed up by experienced specialists on shore, with additional capability in residual strength assessment.
Rules and Regulations for the Classification of Ships – parallel requirement
The Rules and Regulations for the Classification of Ships, Passenger Ships, Part 4, Chapter 2, Section 1, paragraph 1.1.6 contain a parallel requirement to the SOLAS regulation, but there are differences in the way this applies. See Notice No. 7 to the 2012 Ship Rules for details. Note: ships with contracts signed before 1 July 2013, but with their keels being laid after 1 January 2014, will need to comply with the new SOLAS regulation, but Part 4, Chapter 2, Section 1, paragraph 1.1.6 of the Rules will not apply to them.
What should I do now?
To ensure compliance, as a minimum, owners and operators of ships constructed on or after 1 January, 2014, should either install approved onboard stability computers in accordance with the guidelines or arrange shore-based support. 
* The amendments to SOLAS regulations II-1/8-1 were adopted at the 90th session of the IMO Marine Safety Committee (MSC 90) and are contained in Resolution MSC.325(90).


For further information

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