At the request of WWF, WMU will produce a report concerning the PSSA (Particularly Sensitive Sea Area) in the Baltic Sea. This report will be used to evaluate and suggest updates and ways to strengthen the PSSA and the Associated protective Measures (APM's) in force today. In light of the future development of shipping in the Baltic Sea area, and also the expected increase in sea use in general, there is a need to review whether the current measures within the PSSA are sufficient to secure sustainable shipping and sea use in the Baltic, and whether the PSSA mechanism allows to tackle some of the most pressing issues in maritime safety and environmental protection, or whether other mechanisms are to be preferred.