4 Process
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1455 – Guidelines for the Approval of Alternatives and Equivalents as Provided for in Various IMO Instruments – (24 June 2013) - Annex – Guidelines for the Approval of Alternatives and Equivalents as Provided for in Various IMO Instruments - 4 Process

4 Process

  4.1 The following process, illustrated in figure 2, is intended to describe the procedure for obtaining and maintaining approval of an alternative and/or equivalency taking into account the Submitter and the Administration. Even though the diagram in figure 2 may suggest a strictly linear or sequential process, this is not the intention, and it is important to note that each phase may be a series of iterations in a loop. As seen from figure 2, the process, which covers concept development through operation, includes the following milestones:

  • .1 development of a preliminary design;

  • .2 approval of preliminary design;

  • .3 development of final design;

  • .4 final design testing and analyses; and

  • .5 approval.

  4.2 The Submitter should approach the Administration early in the process in order to seek input from experts and specialist opinions on the use of an alternative and/or equivalency design – with the motivation of obtaining approval by the Administration. The details performed in each phase of the process shown in figure 2 may vary on a case by case basis depending on the design being considered or whether the Submitter is applying for preliminary or final approval. However, the basic process outlined in this document should be generally applicable to the approval of most alternatives and/or equivalencies.

  4.3 When a recognized organization acts on behalf of the Administration:

  • .1 Administration's authorization requested by SOLAS regulation XI-1/1 should include the list of activities reserved to the Administration, such as:

    • .1 acceptance of, or exemption from, risk analysis (see paragraph 4.6.3);

    • .2 agreement on evaluation criteria (see paragraph 4.7.1);

    • .3 termination of the process because the evaluation criteria were not met (see paragraph 4.9.3); and

    • .4 final approval (see paragraph 4.19.1); and

  • .2 approvals should only be valid for the ships that were flagged by the Administration at the time the approval was issued.


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.