This Technical Information became null and void on 14 May 2021. Amendment to the ClassNK Rules and Guidance related to computer based systems Tec No.:TEC- 1145 (109kb) Contact:Machinery Department Issued:28 Feb 2018 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