CFD plays an increasingly important role in the optimisation of maritime structures and the investigation of complex flow phenomena. To facilitate the use of reliable CFD in the maritime design and engineering processes, MARIN has invested in a new large computer cluster at its premises. The total MARIN computing power together with the CFD code ReFRESCO, forms a new facility: the ‘Maritime Cluster’. Naval architects and offshore engineers increasingly use CFD calculations themselves or plan to do so in the near future. To stimulate cooperation and interaction in this field, MARIN would like to invite its clients for the ‘ReFRESCO-operation’. In this partnership, MARIN wants to share its dedicated maritime CFD code ReFRESCO, and wants to open up its computer clusters, so that we can jointly work on the reliable and robust application of CFD in our maritime field.