The interest for operational oceanography is expanding in many forecast centers from global to regional scales to improve the analyses and forecasts of the ocean-ice system. This is a step towards improving the predictability of the atmosphere on a wide range of timescales. Operational oceanography involves observations, data assimilation and modelling. This session welcomes talks and posters on different aspects of operational oceanography from observing systems, techniques of data assimilation and ocean modelling, including aspects of atmosphere-ocean-ice coupling and decision making support.