The France-Brazil line makes underway carbonate chemistry measurements on the cargo ship Cap San Lorenzo, which is run by the Maersk company, Denmark. The France-Brazil VOS line began measuring sea surface pCO2 in July 2014, and LOCEAN/IPSL in France is the responsible institution for this effort, with Dr. Nathalie Lefèvre as PI. The ship sails between Hamburg and Buenos Aires and pCO2 measurements are performed between Le Havre, France and Santos, Brazil, to avoid polluted water. The route between Le Havre and Santos takes approximately 2 weeks. The station’s geographical region includes the British Channel and subtropical and tropical regions of the Atlantic Ocean.