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
  Source: ClassNK