Underway temperature and salinity data was collected along the cruise track with two autonomous measurement systems. Usually, the systems are changed after 12 hours. While temperature is taken at the water inlet in about 6.5 m depth, salinity is estimated within the interior measurement container from conductivity and interior temperature.Salinity was calibrated independently for both measurement containers (MCs). Due to questionable water samples related to MC1, an offset estimated from CTD data from the following cruise (MSM89) was used for MC1. For MC2 the offset estimated with the salinity samples was used. For details see Data Processing Report.Salinity Offset MC1 = 0.017583Salinity Offset MC2 = -0.061511No correction was done for temperature.