<p>A new method for evaluating the barotropic component of absolute geostrophic velocity based on Acoustic Doppler Current Profiler (ADCP) and Conductivity-Temperature-Depth (CTD) measurements at hydrographic transects is proposed. The velocities measured by ADCP and the velocities calculated from CTD-data are physically different. ADCP-profiles represent velocity values ​​at a geographic point and at a given time, whereas a profile calculated from the CTD-data of a pair of stations, to within a depth integration constant, is an average value over the spatial and temporal intervals between these stations. The proposed method uses a linear approximation of the measured and calculated current profiles to compensate for these differences. In this case, information is extracted from data on the constant-depth velocity component and the linear slope of these velocity profiles, i.e. the linearized barotropic and baroclinic components of the current, respectively. The assumption about the relationship of these components of both measured and calculated velocity profiles in space and time according to some linear law allows us to obtain a barotropic component of the absolute geostrophic current, which is adjusted in physical sense to the profile calculated from CTD-data, and also does not contain losses in the estimates of the real current field associated with the linear interpolation of measured velocities to spatial intervals between stations. The method is considered using the example of CTD- and lowered ADCP-measurements on the transect A10, carried out in the Atlantic nominally along 30° S in 2011. The efficiency of the method is demonstrated for this transect.</p>