Dataset abstract These data consist of raw echosounder observations in the Southern Ocean collected during the Antarctic Circumnavigation Expedition (ACE; legs 2, 3) and through the Atlantic Ocean (ACE leg 4) using an EK60 GPT operating at 200 kHz. The instrument was calibrated at South Georgia during the expedition (leg 3). Dataset contents *DYYYYMMDD-THHMMSS.idx, auxiliary files, binary *DYYYYMMDD-THHMMSS.raw, data files, binary *DYYYYMMDD-THHMMSS.bot, auxiliary files, binary README.txt, metadata, text Dataset license These data consist of raw echosounder observations in the Southern Ocean collected during the Antarctic Circumnavigation Expedition (ACE; legs 2, 3) and through the Atlantic Ocean (ACE leg 4) using an EK60 GPT operating at 200 kHz. The instrument was calibrated at South Georgia during the expedition (leg 3).

{"references": ["https://www.echoview.com/products-services/news/important-echoview-8-update-for-simrad-ek80-users)", "Kongsberg Maritime AS. (2012). Simrad EK60 Reference Manual. Release 2.4.X. ISBN-13: 978-8066-011-4 .Document number 164692.", "Proud, R., Le Guen, C., Fernandes, P., Everson, I., Bernasconi, M., Lawrence, J. and Brierley, A. (2020). 200 kHz pre-processed echosounder data collected on the Antarctic Circumnavigation Expedition during the austral summer of 2016/2017. (Version 1.0) [Data set]. Zenodo. DOI: 10.5281/zenodo.3979480"]}

The Antarctic Circumnavigation Expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals.