The aim of this project is to develop and test a methodology to assess the management effectiveness of marine Natura 2000 sites and other EU MPAs, in the context of obligations under the Birds and Habitats Directives and commitments under the EU Biodiversity Strategy 2030. This methodology will build on experiences and methods used in the Natura 2000 network and other MPAs, as well as on any other available efforts in developing new systems that can be applied to the European context.