Cruise Report, RV ATAIR, Cruise 067I033-1, Bremerhaven – Thybor?n – Aberdeen, 23 Jul – 15 Aug 2024 45 OS 150 kHz Blanking Distance [m] 6 Maximum Range [m] 400 Transducer Depth [m] 5 Transducer Angle [°] -1.6° Table. 7.2. Specification of the vessel-mounted Acoustic Doppler Current Profiler (VMADCP) in use during cruise 067I033-1. During the cruise, the VMADCP was operated in narrow-band mode to provide maximum data quality. Bin sizes were kept constant to sustain consistency throughout the cruise, while the bottom search threshold was kept constant at 100 m for the southern part of the cruise up to Thybor?n and at 400 m for the northern part. The detailed parameter settings are listed in Table 7.3. The obtained raw data were processed using the CODAS-toolbox, version “co- das_focal_20.04”, from the School of Ocean and Earth Science and Technology (SOEST) at the University of Hawaii, USA. Further information about the toolbox can be found on the CO- DAS website: https://currents.soest.hawaii.edu/docs/adcp_doc/. The settings and procedures follow the recommendations presented by Firing and Hummon (2010). In addition to single-ping data, the TRDI VmDas software calculated short-term averaged data (STA, 30s averages) and long-term averaged data (LTA, 5 min averages). Single-ping editing was not performed during the cruise due to the lack of sufficient calibration data. The pro- cessing resulted in data sets of zonal and meridional current velocities, distributed over lati- tude, longitude, time and depth along the ship’s track. The processed data were stored in several output files in the native MATLAB format (*.mat) as well as netcdf. Erroneous signals from echoes at the seabed were removed from the data. Overview plots were stored alongside the data. Data recording began at the CTD station #002/GN003/ELBE1 on 23 July 2024 at 17:05 UTC. Recording was temporarily stopped and resumed after transects along latitudes were finished in order to run the data pre-processing. Recording was stopped on 3 August 2024 at 10:57 UTC while the vessel was anchored and prior to entering Thybor?n Harbour on 4 August 2024. After leaving Thybor?n and crossing the 3 nm-limit, VMADCP data recording resumed on 8 August 2024 at 18:00 UTC. Again, recording was temporarily stopped and resumed after tran- sects along the northern latitudes were finished in order to run the data pre-processing. The VMADCP recording was stopped on 14 August 2024 at 19:29 UTC when entering the British 12 nm-zone at the end of the cruise when heading for the port of Aberdeen, UK. Whenever the VMADCP was restarted, a new file was created, and the file counter was auto- matically increased. The operation of the VMADCP was documented manually throughout the cruise in a log file. Setup files were stored alongside the data whenever the configuration was changed.