Blue Book

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.
IACS is the owner or licensee of the copyright, database rights and all other intellectual property rights in the Website Materials. Such material is protected by laws and treaties throughout the world.
The trade marks and logos ("Marks") displayed on the Website Materials are the property of or licensed to IACS. You are not permitted to use these Marks without the prior written consent of IACS.
You may download and use the Website Materials only in accordance with the Guidelines and Terms and Conditions.


PART A: 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 Blue Book. 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".


PART B: ZIP file

Due to the large file size the ZIP file will take some time to download depending on your internet connection speed. Below is a table to give you some idea how long this may take, these times can obviously vary due to fluctuations in connections.

File Size Transfer Speed Time to download
652 Mb 512 Kbps 3 hrs 11 mins
1.544 Mbps T1/DS1 1 hr 1 mins
10 Mbps Thin Ethernet 9 mins
44 Mbps T3/DS3 2 mins 10 secs
100 Mbps Fast Ethernet 57 secs 

Depending on transfer speed at your location and assuming large data transfer taking place during working hours, it is recommended that you commence downloading of the Blue Book package zipped file before you go to lunch in locations where your transfer speeds are fast to very fast. In locations where the speeds are medium to slow, it is recommenced the download of the relevant file is carried out after office hours or overnight.

To assist you with this activity we have included a table above showing time taken to download for various transfer speeds.

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).

Using a program such as WinZip or WinRAR extract the folders and files contained within to your own computer or tablet.

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.


Forgotten Password

Please enter your email address here and you'll receive an email with instructions on how to reset your password.