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A big open problem for the operational oceanography community, pertinent to handling and exploiting data, is that four dimensional variational data assimilation (4DVar), which can greatly improve the quality of forecasts, is computationally very expensive (it can double or triple computational overheads). Many of the EuroGOOS member institutes have embarked on a role to do 4DVar, but found that they lack the HPC (high performance computing), computational power or resources. The RI representative called for improvements and enhancements in the HPC or coding environment that would make 4DVar more feasible.