Research expedition MSM111 BAFFDEEP took place from 2nd of September 2022 (Reykjavik, Iceland) to the 4th of October (St. John's, Canada). Physical oceanographical data for a nine stations was recorded (Seasave V 7.23.1) using a Seabird Electronics SBE911 plus CTD mounted in a SBE water sampler rosette. The file contains the data for pressure (SN 0807), temperature (SN 4459 & SN 4450), conductivity (SN 2939 & SN2935), salinity, density, dissolved oxygen concentration (SN 0951 & SN 0881), chlorophyll a concentration and turbidity (SN 1755) for the downcast of the instrument. Raw data were processed (SBE Data Processing V 7.26.2.14) according to Seabird recommendations which are filtering of pressure data (0.15 s), hysteresis correction for oxygen (default values from instrument configuration file), cell thermal mass correction (default values) and loop edit (default values). For redundant sensors only the average is reported. The file contains the bad data flag (Flag SBE), derived from the SBE Data Processing software, invalidating the values of all sensors of the respective scans as well as an individual flag for each parameter resulting from the recommendations for real-time data processing of EuroGOOS and GTSPP and the outlier detection method CoTeDe (https://github.com/castelao/CoTeDe). Details for these procedures are included in the data processing report.