ClassNK has informed the requirements related to computer based systems by ClassNK Technical Information TEC-1114 issued on 16 June 2017.
After issuing of the Technical Information, ClassNK reviewed the contents of the Technical Information and has issued TEC-1145 alternatively.
The ClassNK Technical Information TEC-1114 is revoked by this Technical Information.

IACS UR E22(Rev.1) specifies requirements related to composition and function of computer based systems used for machinery systems such as monitoring systems.
These requirements have already been incorporated to Rules and Guidance of NIPPON KAIJI KYOKAI (hereinafter referred as "the Society").
Since the necessity for security measures which reduce risks specific to computer based systems such as computer viruses has been increasing in recent years, IACS discussed way to clarify requirements and adopted UR E22(Rev.2) in June 2016, which specifies responsibilities of stakeholders, security measures for software (SW) and hardware (HW) and quality management for said systems.
Accordingly, relevant requirements in the Society's Rules and Guidance were amended and what concerned organizations shall address are informed.

[Summary of Rules]
These rules apply to SW and HW for automatic or remote control systems. Additional test or type approval* may be required for the SW and the HW up to effect of their failures. The effect is defined with three categories and the requirements under each category are applied accordingly. Furthermore, responsibilities and roles of owner, system integrator and supplier to comply with the rules are set out. In particular, system integrator is a new assigned stakeholder and shall take a responsibility of integrating systems. However, in case where any system integrator is not assigned, shipyard shall take the roles during construction.

1. System Categories
Computer based systems shall be assigned category III, II or I in accordance with 2.3 and Table 2.1 of Annex D18.1.1, Part D of the Guidance for the Survey and Construction for Steel Ships.

(To be continued)