Monitoring the surface partial pressure of carbon dioxide (pCO2 in the oceans is fundamental for understanding both the health of the oceans and the general state of the climate across the planet. In this context, the measurement of this variable in areas where the scarcity of data is more marked is increasingly important: Giovanni Soldini's navigation using the Maserati Multi70 Trimaran, properly equipped for the measurement of this quantity, fits precisely into filling this gap. The comparison of the post-processed experimental data with the model data provided by the Copernicus platform, although based on some necessary method approximations, is encouraging, showing relative differences below 5 %. © 2024 IEEE.