The expedition MSM050 KüNO INTERFACE (Coastal benthic environments in North and Baltic Sea: Evaluation of processes and transports at the sediment-water interface) was planned  as a joint activity of the BMBF-funded projects NOAH and SECOS to increase the understanding of biogeochemical, biological and physical processes along the sediment-water interface in the North and Baltic Sea. This cruise aimed for the completion of seasonal data in these regions, with the main focus on the determination of biogeochemical functions, their control mechanism for the relevant benthic habitat types and turbulence measurements of near bottom water layers.