Decoded telegrams of surface weather, ocean and ice state observations in the Southern Ocean on board the R/V Akademik Tryoshnikov during the Antarctic Circumnavigation Expedition (ACE) in the austral summer of 2016/2017. Data file(s): ACE_telegram_decoded_YYYY_MM_DD_Hhh.csv File header: Symbolic_Letters: symbols as they appear in the original telegram Symbol_Description: text description of the telegram symbol Code_Figure: value for the variable appearing in the telegram Decoded_Information: decoded value for the variable