SIMAtlantic aims to support the establishment and implementation of maritime spatial planning (MSP) in five European Atlantic countries: France, Ireland, Portugal, Spain and the United Kingdom. It is a two-year project co-funded by the European Union and implemented by partners representing academic institutions, marine planning authorities and scientific public bodies, who will work together to share knowledge and ultimately build long-lasting cooperation in MSP. The project will produce methodologies, practical guidance documents, communication tools and a catalogue of relevant information to assist the work of MSP authorities. These will be tested in specific pilot study areas. The work will culminate in an ‘Atlantic Vision’ – a roadmap for MSP in the European Atlantic marine region.