Doing research together and fishing for measurement data in the Baltic Sea. - The companion app to the research project Citizen Science: Sail for Oxygen (sail4oxygen) by GEOMAR Helmholtz Center for Ocean Research Kiel and Trans-Ocean - Association for the Promotion of Offshore Sailing and funded by the Federal Ministry of Education and Research is here. She will keep you up to date on the latest developments relating to the project. It also supports you in transmitting measurement data from probes to GEOMAR in the correct format. (The app from the probe manufacturer is also required to download the data from the probe to the smartphone) All information about the project and how to get to the measuring probes is also available at sail4oxygen.org.