Assess the need to clean up contaminated wrecks and chemical weapons where it is required to protect sensitive marine ecosystems, taking into account completed and ongoing work carried out by HELCOM. Since November 2011 an ‘HELCOM-Muni’ expert group has been updating the report on chemical munitions dumped in the Baltic Sea. The updated report is expected to be available in 2013. Activities should encompass identification of the current priority threats and establishment of the costs and benefits of any possible action under agreed research programmes. This should build on existing knowledge and mapping in the Baltic Sea. The development of major offshore infrastructure projects should also take into account the location of underwater chemical weapon dumping sites. Achievements: A final report by HELCOM MUNI was published as a background document for the 2013 HELCOM Ministerial Meeting, including recommendations for additional research, management and information. As a continuation, a HELCOM Expert Group on Environmental Risks of Hazardous Submerged Objects (HELCOM SUBMERGED) was established in 2013 to compile and assess information about all kinds of hazardous objects and associated risks.