This Townhall Meeting is jointly organised by three future European Large-Scale Research Infrastructures: the European Research Icebreaker Consortium (ERICON - AURORA BOREALIS), The Svalbard Integrated Arctic Observing System (SIOS) and the European Mulitdisciplinary Seafloor Observatory (EMSO). Each of these infrastructures is planned to observe and monitor the European and Polar Oceans in a highly integrated and long-term systematic mode. The Meeting will provide the most recent update about the progress in scientific, organisational and political implementation for each of these complementary infrastructures. It shall also give the opportunity to discuss any questions and needs for the science community and become further involved in the ongoing planning processes.