current technologies and management practices for reducing underwater radiated noise

This report, prepared by NCE, provides a comprehensive overview of current technologies and management practices aimed at reducing underwater radiated noise (URN) generated by vessels. It explores the technical feasibility and economic viability of various URN mitigation strategies, offering practical guidance for implementation across vessel types and operational profiles.

With propulsion systems and onboard machinery identified as primary contributors to URN, the report emphasizes the importance of integrating noise reduction strategies early in the vessel design process—ideally beginning with modeling and analysis and continuing through construction and operation. The identified technologies and design approaches are intended not only to reduce URN but also to enhance fuel efficiency, offering both environmental and economic advantages.

Click here to access the full report Reducing Underwater Radiated Noise