CTD-O2 (Conducticity-Temperature-Depth-Oxygen) data were collected with a seabird SBE911+ (SBE19  for FR6-8) CTD. The vertical profiling resolution was nominally 1db (=bin size). FR-1-to-17 data were only processed with SBEDataProcessing. FR18-to-22 CTD data were processed and controlled using chemical analysis made on discrete samples. The last CTD data (FR23-to-27) were processed using an improved version of CADHYAC software (Kermabon et al., 2015) carried out by the US IMAGO (IRD). For details on the data processing methodology, see reports. Absolute referencing was provided by Global Positioning System (GPS) navigation.