Focused on biogeochemical Essential Ocean Variables and to help train the new generation of marine observers in the appropriate use of a suite of biogeochemical sensors and to assure the best possible quality of the data produced, the International Ocean Carbon Cooperation Project (IOCCP) and the Integrated Carbon Observation System Ocean Thematic Centre (ICOS OTC) will hold a 14-day training workshop on “Instrumenting our ocean for better observation: a training course on a suite of biogeochemical sensors”. This course will be held in Fiskebäckskil, Sweden. The deadline for applications is February 1, 2023.