Cabo Verde formed several partnerships in maritime security with Brazil, the European Union, Portugal, and the United States. Its strategic location remained significant in the international arena as a potential platform for cooperation in maritime transport, port operations, and trade. Maritime security and the fight against transnational crime ranked among the country’s national priorities, given its vast Exclusive Economic Zone and its position within the maritime corridor linking Brazil and the Gulf of Guinea. Cabo Verde chaired ZOPACAS for 2 years from April 2023 onwards and hosted the Multinational Maritime Coordination Centre for Zone G in Praia from February 2024. This centre formed part of the Yaoundé Architecture for Maritime Security, which also included Gambia, Guinea-Bissau, Mali, and Senegal. The research question is: How did Cabo Verde articulate cooperation actions with its international partners, thereby contributing to the strengthening of the South Atlantic maritime security system as a whole? This study aims to clarify the decision-making framework of the actors involved in maritime security in the region, with a view to operationalising the Multinational Centre mentioned above. It also seeks to identify the obstacles to multilateral cooperation in this area and to explore possibilities for overcoming them.