On 30 October 2026, the classification society ClassNK issued the second edition of its Guidelines for Cyber Security Management System for Ships, a document flagged in a MarineLink Maritime News report on the same date.

The publication sets out requirements for a Cyber Security Management System, commonly abbreviated as CSMS, and is presented as guidance for organisations responsible for ships. The note accompanying the release identifies shipowners and ship management companies as the principal audience for the document.

ClassNK's second edition carries the same formal title as the first but denotes a subsequent iteration of its guidance for maritime cyber security; the MarineLink report that verified the release recorded the item as dated 30 October 2026. The document is described in the report as establishing the requirements that a CSMS should meet for ships.

The guidance is framed as a tool aimed at those charged with corporate and operational oversight of ships, with the stated purpose of clarifying the requirements of a CSMS. The MarineLink summary used to verify the release emphasises the target readership of shipowners and ship management companies.

Scope and purpose

The guidelines are presented as a set of requirements for a Cyber Security Management System for ships, with the explicit intention of informing practices for the organisations that operate and manage vessels. The verified notes make clear that the second edition is directed at shipowners and ship management companies and that its content is about what a CSMS must contain.

Release details and verification

MarineLink Maritime News published a report titled ClassNK Releases Second Edition of Cyber Security Management Guidelines and dated that item 30 October 2026; that report serves as the verification for the existence and timing of ClassNK's second edition. The MarineLink summary used in verification repeats that the publication sets out CSMS requirements and identifies the intended audience.

Key factual details

  • Document: Guidelines for Cyber Security Management System for Ships (second edition).
  • Issuer: ClassNK.
  • Verified publication reporting the release: MarineLink Maritime News.
  • Report date: 30 October 2026.
  • Intended audience: shipowners and ship management companies.
  • Purpose as stated in the report: to set out requirements for a Cyber Security Management System (CSMS) for ships.

The release of a second edition under the same title and the clear naming of the CSMS as the subject matter are the central, verifiable facts available from the source material. MarineLink's report supplies the publication date and identifies both the issuer, ClassNK, and the target readership of shipowners and ship management companies.

Further detail regarding the content of the guidelines, the nature of any changes from the first edition, or the ways in which compliance might be assessed is not available in the verified notes supplied for this report. The facts presented here are limited to the title, edition, issuer, date of the report and the stated purpose and audience as recorded by MarineLink Maritime News on 30 October 2026.