Underwater Radiated Noise (URN) from ships is a major but often overlooked source of marine pollution. While shipping is praised for its low carbon emissions, the noise trapped beneath the water disrupts marine species’ communication, navigation, and reproduction.

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A recent European Commission notice (March 11, 2024) sets a new threshold for underwater noise impact, requiring 80% of marine habitats to remain unaffected. Though it doesn’t impose strict ship noise limits, it mandates that EU member states assess and mitigate underwater noise pollution.

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Unlike airborne noise, which has long been regulated, underwater noise has only recently gained attention. Research over the past two decades has revealed its significant impact on marine life, with studies linking whale strandings to sonar use.

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The LOWNOISER project is stepping up to address this challenge. Supported by the EU, it aims to reduce URN from ships using existing and adaptable technologies. The project will also develop monitoring tools, set industry guidelines, and create certification frameworks for quieter shipping operations. With solutions applicable to new builds, retrofits, and ships in service, LOWNOISER is paving the way for a more sustainable and marine-friendly shipping industry.

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