The cargo ship Sea-Cargo Express was built in 2012 and is owned by Sea-Cargo AS. It is 119 m long and primarily sails between Trondheim in Norway and Aberdeen in Scotland, visiting Norwegian harbours along the Norwegian coast and crossing the North Sea. The ship took over for the cargo ship Trans Carrier in 2022 and is now equipped with an automatic sea surface measuring system incorporating sensors for the partial pressure of carbon dioxide (pCO2), temperature, salinity, and oxygen. On its route, Sea-Cargo Express sails in ocean regions with distinct biogeochemical features and large salinity gradients.