Blue Book

 "2022 Blue Book" contains the latest adopted IACS publications as on 1 January 2022 as well as previous revisions of IACS publications and historical data. The Blue Book is updated and published once a year only, next Blue Book will be issued in January 2023.

Blue Book ZIP file: Please note, once the file is downloaded to desktop or laptop, there is no need for internet connection as all files will reside on the local disk and there will not be a need for downloading any further files until the next revision (circa a year's time).

To view the Portable Document Format (PDF) files you must have Adobe Acrobat Reader or Exchange installed on your system. If not already installed on your system, please install the Adobe Acrobat Reader software from the Adobe website ( or App Store/Marketplace etc.

After installing Adobe Acrobat Reader, open the file entitled "Welcome.pdf" to begin to view the IACS Blue Books. Then follow the links as required.

Search Functionality: Perform "Search" command using the index

The Blue Book has been indexed as follows:

  1. Complete indexing : This is to help the users find a word throughout the current IACS publications. If you want to search the documents containing a specific word in all IACS Resolutions, please use the index named "search.pdx".
  2. You may be asked to choose where you would like to search. Select "In the index named search.pdx". 

The content in this Website and the material available on it, including (without limitation) the IACS Blue Book, (together, the "Website Materials") are offered as a helpful resource for you and your company and is designed to help you obtain information and guidance. It should be noted that, for classification purposes, the Rules of the individual members apply, not the IACS resolutions contained in either the "Blue Book" and "Green Book".

While every effort has been made to ensure the accuracy of information presented, the International Association of Classification Societies, its members and International Association of Classification Societies Limited (together, "IACS") make no representations or warranties as to the completeness or accuracy of information in the Website Materials. Furthermore IACS hereby disclaims all responsibility for and accepts no liability for any errors or losses caused by any incompleteness or inaccuracies of such information or the consequences of any person acting or refraining from acting or otherwise relying on such information.

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