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