free-falling system (bottom-lander) and an autonomous benthic crawler system deployed during RV POLARSTERN expeditions PS107 and PS108, respectively, in summer 2017. Another bottom-lander equipped with [...] and 2500 m, respectively, off Svalbard. The recovery of the two instruments is planned for the RV POLARSTERN cruise PS121 in summer 2019. Towards the end of the week we finally succeeded to recover our benthic