Considering the actual computer-based systems that are adopted to vessels, ClassNK Technical Information No. TEC-1316, dated January 26, 2024, has been partially updated and published as TEC-1348. Accordingly, ClassNK Technical Information No. TEC-1316 is out of print. The main changes are as follows
・ Update content to be included in "3. Documents to be submitted" in TEC-1316
・ Addition of example items of systems falling under Category II and III in "Attachment 1. Example of List of system categorizations" in TEC-1316

IACS UR E22 (hereinafter referred to as "UR E22") is unified requirements relating to computer-based systems used on vessels, which has recently been amended and adopted as UR E22 (Rev.3) to better clarify the requirements, specific to each of the phases of design, development, commissioning, and maintenance.
ClassNK has amended Rules to involve incorporating UR E22 (Rev.3) into Rules/Guidance for the Survey and Construction of Steel Ships, Part X that have been newly established (scheduled to come into effect in July 2024). Contemporaneously with the amendments, existing Part D, Chapter 18, Annex 18.1.1 of the Rules and Guidance for the Survey and Construction of Steel Ships, which specifies the requirements pursuant to UR E22 (Rev.2), has been deleted.

In this connection, the Rules for the Survey and Construction of Steel Ships, Part X is available on ClassNK website Technical Rules and Guidance for download.

The purpose of this TEC-1348 (hereinafter referred to as "this TEC") is to disseminate information on what actions need to be taken by the manufacturers, shipyards, and vessel owners (including operators) pursuant to the new rules on the computer-based systems that will be used onboard any vessels whose construction contract date is on or after 1 July 2024, to which UR E22 (Rev.3) will apply.

For all vessels whose construction contract date is on or after 1 July 2017 but is on or before 30 June 2024, UR E22 (Rev.2) continues to