Cruise Report, RV ATAIR, Cruise 067I033-1, Bremerhaven – Thybor?n – Aberdeen, 23 Jul – 15 Aug 2024 39 To check the quality performance of the TSG system, water samples were taken twice a day directly from the TSG system and analysed using an AUTOSAL salinometer. Standard oper- ating procedures (SOPs) for assessing the data quality of the near-surface temperature and conductivity/salinity measurements from the TSG system installed aboard RV ATAIR are cur- rently being developed at a national level in collaboration with the German Marine Research Alliance (DAM). Once the SOPs have been implemented, and the data quality control has been finalised and documented, the resulting data will be made publicly available via submission to the PANGAEA database (https://www.pangaea.de). Regarding the dual-wavelength ECO sen- sor data for fluorescence and turbidity, there are not yet any defined SOPs, and any data quality check is presently not carried out regarding near-surface mesurements for fluorescence and turbidity. Sensor Device Sensor Type Serial Number Calibration Date SBE21 thermosalinograph, conductivity and in- ternal temperature 3245 05 Dec 2023 SBE38 external temperature 1113 05 Dec 2023 WetLabs ECO FLNTURT fluorescence and turbidity FLNTURT-5883 --- Table 7.1. Sensor specification of the thermosalinograph/fluormeter system operated during cruise 067I033-1. Figure 7.3 shows the temporal evolution of the properties derived from the TSG/ECO-sensors. The uncorrected TSG-derived temperature at a depth of 4 m ranged from 11.7°C to 19.8°C and was on average 16.3°C. Uncorrected TSG-derived salinity ranged from 26.81 to 35.22 and was on average 34.03. Fluorescence ranged from 010. µg/L to 10.36 µg/L and was on average 0.72 µg/L. Turbidity ranged from 0.17 NTU to 4.28 NTU and was on average 0.41 NTU. All statistical values refer to the smoothed data with outliers removed. Figures 7.4 to 7.7 show the spatial distribution of the near-surface temperature, salinity, fluorescence and turbid- ity, respectively.