The Marine Accident Investigators’ International Forum (MAIIF) is an international non-profit organisation dedicated to the advancement of maritime safety and the prevention of marine pollution through the exchange of ideas, experiences and information acquired in marine accident investigation. It aims to promote and improve marine accident investigation, and to foster cooperation and communication between marine accident investigators. It aims to develop and sustain a co-operative relationship among national marine investigators in order to share knowledge in an international forum, and to improve maritime safety and the prevention of pollution via the dissemination of information from the investigative process. 

The North Atlantic Coast Guard Forum (NACGF), formed in 2007, aims to increase cooperation amongst member countries on maritime safety and security in the region. The NACGF is not policy or regulatory oriented, is non-binding, voluntary, and operates within existing legal frameworks. Its members are Belgium, Canada, Denmark, Finland, France, Germany, Iceland, Ireland, Latvia, Netherlands, Norway, Portugal, Russia, Spain, Sweden, the United Kingdom, and the United States of America. Estonia, Lithuania, and Poland have observer status.

The Maritime Analysis and Operations Centre – Narcotics (MAOC (N)), based in Lisbon, has 7 EU Member Countries: France, Ireland, Italy, Spain, Netherlands, Portugal and the UK. It is co-funded by the Internal Security Fund of the EU and is a forum for multi-lateral cooperation to suppress illicit drug trafficking by sea and air. It is a European Law Enforcement unit with military support that coordinates maritime and aviation intelligence, resources and trained personnel to respond to the threat of illicit drug trafficking.

The Bonn Agreement is the mechanism by which ten Governments, together with the European Union, cooperate in dealing with pollution of the North Sea by oil and other harmful substances. The signatories to the Agreement are the Governments of Belgium, Denmark, France, Germany, Ireland, Netherlands, Norway, Sweden, the UK, and the European Union. Spain joined as a Contracting Party in 2019.