Within the framework of the Russian-German BMBF-funded TRANSDRIFT project moored upward-looking Acoustic Doppler Current Profilers (ADCPs) were deployed in the Laptev Sea between 2013 and 2015. Two upward-looking Workhorse 300 kHz Sentinel ADCPs (manufactured by Teledyne RDI) were deployed at the 1893 and Taymyr stations in September 2013. During a Russian expedition in September 2014 both moorings were recovered and partly redeployed at the two stations until September 2015 (one upward-looking ADCP was substituted in 2014). The four data sets (ADCP_BT_1893_1314.txt, ADCP_BT_Taymyr_1314.txt, ADCP_BT_1893_1415.txt and ADCP_BT_Taymyr_1415.txt) are named to indicate the location of the deployment (station name) and the sampling period. Each file contains hourly values of error velocity (in mm/s) and range (beams 1 to 4, in m) data that was recorded using the ADCPs bottom track (BT) mode. Additionally, the instruments roll and pitch values (in deg) are included. The deployment sheets are attached as well. All moorings were equipped with numerous other instruments. Their data has been published separately.