The first float (WMO 7902191) was deployed in June 2024 during the H2020 DOORS cruise in the Georgian sector of the Black Sea aboard the R/V Mare Nigrum. The second float (WMO 6990663) was deployed in July 2024 within Bulgaria’s exclusive economic zone (EEZ) during the R/V Academik survey. Both floats are ARVOR-I models, equipped with SBE CTD and AADI optode sensors