Update on ClassNK RuleViewer Functionality

29 January 2026

ClassNK has implemented a functional update to its online rules platform “ClassNK RuleViewer”, aiming to further enhance user convenience.
The “ClassNK RuleViewer” is available on ClassNK’s Technical Rules and Guidance Portal Site and can be accessed directly via web browser.

The main updates are as follows:

Addition of Free-Word Search Function to the Rules Selection Screen
・Users can now perform a free-word search accross all ClassNK’s technical rules directly from the document selection screen, without needing to open individual rule documents.

Addition of Export Function for Rule Amendment Search Results
・Search results can now be exported in Excel format.

Technical Rules and Guidance Portal Site:
https://www.classnk.or.jp/hp/en/rules/