Visualization tools for real time water quality data have been developed (swell.fmi.fi/Algaline/about.html). The first demonstration product includes ferrybox data from passanger ferry Silja Serenade commuting between Helsinki, Finland and Stockholm, Sweden. Tools include python and R scripts for data transfer and visualization. Plots include transect plots and contour plots for last 1 month period and for the current year. Variables include Temperature, Salinity, CDOM, Chlorophyll a, Oxygen, Phycocyanin and Turbidity. Transect data shows also which parts of the data are flagged as bad quality data. A map showing transects and the current location of ship is also included.