This collection contains data for paper "Preface: Special Issue on Probing the Open Ocean With the Research Sailing Yacht Eugen Seibold for Climate Geochemistry" (Schiebel et al., 2024). When using the data, please refer to the paper mentioned above . If further data needed, please contact the corresponding authors. All files are UTF-8 encoded. Each file contains a tab-separated table, which is preceded by a header describing the individual columns.