RV "Akademik Tryoshnikov" left Arkhangelsk on August, 17 2018 and on August 22-30, observations in the western part of the Laptev Sea under the auspice of CATS/Transdrift program were carried out. Some additional stations were taken on September 4.There are 42 stations obtained from the bottle sampling files. Observations were taken by using a Seabird SBE911plus CTD system. This system measures conductivity, temperature, and pressure at a 24Hz sample rate. Pressure was measured by a Digiquartz® sensor with accuracy of ±0.015% of full-scale range. For temperature measurements an SBE 3T sensor was used with accuracy of 0.005°C. Conductivity was measured by an SBE 4C sensor with accuracy of 0.0003 S/m.This study was supported by the Russian Ministry of Science and Higher Education, project: RFMEFI61617X0076.