The overall objective of this work package is to bridge the gap between the science part of the program and the end users by different means of communication and collaboration. This will be done as part of a participatory process, not only with the boat owners but also with representatives from marinas, boat organisations, boat clubs, antifouling service companies and authorities, which will promote a change in individual’s practices related to antifouling towards more environmentally safe methods. Thus, WP5 will identify specific areas where more information is needed and develop and use innovative forms of communication for boat owners’ participation and collaboration. WP 5 will also evaluate the effect of the collaboration and communication activities on boat owner antifouling practice in surveys and interviews. WP5 will also arrange meetings with boat owners and representatives from marinas in the form of on-site communication/meetings as well as help WP2 with demonstration projects on sustainable practices related to antifouling use.