This document provides the COMPLETE project outputs and deliverables related to biofouling management in the Baltic Sea Region, contributing to the implementation of the IMO Guidelines for the control and management of ships' biofouling to minimize the transfer of invasive aquatic species (resolution MEPC.207(62)) which are currently under review (MEPC.1/Circ.811), and the Guidance for minimizing the transfer of invasive aquatic species as biofouling (hull fouling) for recreational craft (MEPC.1/Circ.792) in the Baltic Sea Region. The concept of the Regional Baltic Biofouling Management Roadmap was already submitted to HELCOM MARITIME 19-2019, being welcomed and supported, indicating the way forward for the further development of the concept into the attached proposal for a Biofouling Roadmap