This presentation introduces ClassNK's revised guidelines, which were published this year. Firstly, it provides an overview of the revised guidelines, which expand on the main part and specify detailed requirements for autonomous navigation systems (ANS) in the annex. The annex additionally describes safety evaluation methods using simulation techniques for fundamental ANS functions. The presentation then explains one such method in detail, focusing on the evaluation of the maneuvering control function. It introduces the method detail, including the creation of simulation scenarios, the requirements for the mathematical manoeuvering model and the performance indicators.