Maritime glossary

Underwater radiated noise

Also called URN, ship noise, underwater noise

Sound that ships emit into the sea, mostly from propeller cavitation and machinery, which can disturb marine life. The IMO's guidelines to reduce it, revised in 2023, are voluntary.

Used in these articles

Related terms

Maritime law, bodies and security

Related coverage

Subscribers read the desk company and technology reports on the names it covers, including new reports before they are published on datadeep.tech.