Direct CO2/DMS flux measurements were done aboard the RV Sonne sailing from Durban, SA to Port Louis, MU (SO 234-2, 8–20 July 2014) and from Port Louis, MU to Malé, MV (SO 235, 23 July to 8 August 2014). Additionally, bulk air and seawater concentrations of CO2 and DMS were recorded. Basic meteorological observations were done by the ship's automated weather station. The wind speed is measured by the ship's meteorological station and then recalculated by stability parameters of COARE to u10n