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Limiting Underwater Radiated Noise (URN) at the IMO
Underwater radiated noise (URN) from ships has been proven to have a damaging effect on marine wildlife and even marine plants of many types. Factors which have been identified as contributing to URN, include ship resistance and propulsion together with ship machinery systems and operational approaches.
For several years the IMO has been working on guidelines to mitigate the effects of URN and in 2014 it approved its first set of guidelines on underwater noise (MEPC.1/Circ.833). Since those guidelines were approved there has been a doubling of noise levels in the ocean.
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Information Note Details
Published date: 29 September 2023
Information note ID: 1670
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