ClassNK publishes an onboard poster describing common issues and recommended measures when using compliant fuel oil

08 July 2021 – Leading Classification Society ClassNK has published an onboard poster for ships titled “Issues after starting to use VLSFO,” which outlines common main engine issues and recommended countermeasures when using Very Low Sulphur Fuel Oil (VLSFO) that complies with SOx regulations.

After the enforcement of regulations to limit sulphur content in marine fuel oil to 0.50% or less in 2020, issues when using compliant fuel oil are being reported occasionally. Examining the reported issues along with the properties of compliant fuel oils that it had previously investigated, ClassNK compiled recommended measures for early detection and prevention of issues on board. The contents has been released in a poster format so that crew members can quickly refer to it in case of any trouble.

The poster can be downloaded in electronic format on the ClassNK website ( from “My Page>Technical documents/Other”.

Attachment for quick reference – Issues after starting to use of VLSFO (ClassNK)


For more information on this topic please contact:

ClassNK Public Relations Team
Tel: +81-3-5226-2047