An online workshop was organized in the framework of an INTERREG Baltic Sea Region programme project COMPLETE. The workshop was organized by the Marine Research Institute, Klaipėda University and attended by 39 participants from 13 countries and intergovernmental organization HELCOM. The participants were introduced to a model agreement that defines the roles and responsibilities of those who send and receive the alert. The “Fast Track” was introduced, which aims to simplify the entry of the data required to send an alert. During the discussion, the participants were asked to answer questions (“Do you know what to do when you receive a warning signal?” and “Do you know which institutions in your country will you send a warning signal to?”). Finally, participants were asked to complete a questionnaire to summarize their views on how the EWS can help implement the Ballast Water Management Convention.