Time series data of hydroacoustics and multi-frequency acoustic backscatter were obtained from mooring F4-OZA in the Fram Strait in September 2018 - July 2020 as part of the Helmholtz infrastructure program Frontiers in Arctic Marine Monitoring (FRAM) and the long-term monitoring program at AWI HAUSGARTEN. The mooring was deployed during RV MARIA S. MERIAN expedition MSM76 and recovered during MSM93. The mooring included one ASL Acoustic Zooplankton Fish Profiler (nominal depth: 155m; data archived elsewhere) and one Develogic Sonovault (nominal depth: 836m; data also archived elsewhere). The attached .zip file only contains the mooring diagrams.

The authors are grateful to the captains, crews and technical/scientific staff of the expeditions MSM76 and MSM93 onboard RV MARIA S. MERIAN. Many individuals have contributed to the conception of the research, the preparation of the instruments, the deployment and recoveries, as well as to the retrieval of the data, which we greatly appreciate. We also acknowledge funding from the Helmholtz infrastructure program "Frontiers in Arctic Marine Monitoring", and the Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung.