Press Release

23 July 2025

Tokyo - ClassNK has released “ClassNK Technical Journal No.11 2025 (Ⅰ) “. This issue features the title “Latest Technological Trends for Protection of the Marine Environment”, providing the particularly well-received presentations on “Underwater Noise from Ships” and “Safe Decarbonization” from “ClassNK R&D Forum 2025”, which was attended by more than 200 participants.

"ClassNK Technical Journal”, has been published to contribute to the advancement of technology and society through the outcome of R&D and technical activities. The contents of the latest issue are as follows:

Special Feature Articles on “Latest Technological Trends for Protection of the Marine Environment”
- Guidelines for Underwater Noise from Ships and Trends in the IMO, Etc.
- Development and Application of Ship Underwater Radiated Noise Estimation Tool for Preservation of the Marine Environment
- Measurement of Ship Noise in Shallow Sea Area
- Recent Information on the Development of IMO Guidelines for the Safety of Ships Using Ammonia as Fuel and Initiatives of ClassNK for Practical Application of Ammonia-Fueled Ships
- Research to Develop Safety Assessment Measures of Alternative Fuel/New Cargo Transportation
- Commentary on “Bayesian Estimation of Ammonia Leak Frequency for Risk Assessment of Ammonia-Fueled Vessels”

Technical Topics
- Revealing a Fuel-Saving Tip for Main Engine Operation in Rough Sea Conditions
- Introduction of Examples of the Use of AIS Data
- Recent Topics at IMO


ClassNK Technical Journals are available to download via ClassNK’s website.
https://www.classnk.or.jp/hp/en/research/rd/giho.html



For inquiries about this press release:
ClassNK Research Institute
Tel: +81-3-5226-2737
E-mail: ri@classnk.or.jp

For media-related inquiries:
ClassNK Public Relations Team
4-7 Kioi-Cho, Chiyoda-Ku, Tokyo 102-8567 Japan
Tel: +81-3-5226-2047
E-mail: eod@classnk.or.jp

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