Shipboard loosely-tethered free-falling microstructure (MSS) measurements were carried out during expedition Transdrift-XXIV to the eastern Arctic Ocean onboard the Akademik Tryoshnikov (AT2018). The expedition was jointly organized between the US-Russian NABOS (Nansen and Amundsen Basin Observational System), the German-Russian CATS (Changing Arctic Transpolar System, funded by BMBF), and the TICE-project funded by the Alfred-Wegener-Institute. 236 stations were carried out between 25 August and 23 September 2018. The profiler MSS90L manufactured by Sea and Sun Technology samples at 1024 Hz and was equipped with temperature, salinity, shear, and fluorescence sensors.Details on data processing can be found in Schulz et al. (2021).Additional parameters and metadata are provided in the attached netcdf file.