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Cogg Hall: TUE - SU 10 AM till 6 PM + Ships reopen on 18 March 2024 + free entrance for refugees + Безкоштовний вхід для українців


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The hazards of war remnants


The hazards of war remnants

Scientific diver above ammunition in the Baltic Sea’s Kolberger Heide munition dump site. © Jana Ulrich, GEOMAR

Legacies of warfare

Legacies from warfare are hazardous in many ways: Munitions wash up on shores or become entangled in fishing nets. Wreck sites can also endanger shipping, fishing or offshore construction projects.

Danish Navy divers investigating the wreck of submarine SM UC 30 in the North Sea © Danish Navy and Aarhus University

Invisible threats

There are also invisible hazards: The metal casings of munitions gradually corrode, allowing the hazardous substances within to leak into the marine environment. Chief among these is trinitrotoluene (TNT), the most common form of explosive – and a proven carcinogen.

The European lobster (Homarus gammarus) on the wreck of the SM UC 30. © Danish Navy and Aarhus University

Wrecks as habitat for animals

Wreck sites are home to creatures too. They take up the dissolved explosive with the water or they ingest these substances by eating contaminated organisms, allowing toxic chemicals to enter the food chain This shows how toxic remnants of war could eventually end up on our plate.

Diving in the North Sea is complicated and dangerous, but working with partners helps to ensure our explorations are a success. © Vlaams Instituut voor de Zee

Investigating the wrecks

Researchers in the project North Sea Wrecks assess the condition of the wreck and its cargo. Such collaboration helps participants in the North Sea Wrecks project (and in partner projects) to evaluate risks.






Opening hours

Cog hall: TUE - SUN from 10 am to 6 pm, open daily from 18.3.2024

Ships: Ships reopen on 18 March 2024

how to reach us

Deutsches Schifffahrtsmuseum
Hans-Scharoun-Platz 1
D-27568 Bremerhaven


T. +49 471 482 07 0

Contact person


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