A COMPLETE project representative prof. Sergej Olenin presented the COMPLETE project in his lecture “The ballast water management: towards a decision support system for the Baltic Sea region” at an international conference “The Baltic Sea: Gateway or cul de sac ?” (16-18 May 2018, Lithuanian Maritime Academy, Klaipėda, Lithuania), which was arranged jointly by the SEFACIL Foundation, Lithuanian Ship Owners Association, Port of Klaipeda and other stakeholders.