The deployment of ocean-based ‘negative emissions technologies’ (NETs) to enhance the natural function of the ocean to sequester and store carbon has been proposed to keep within temperature limits as agreed upon by the global community. While the deployment of NETs for large-scale carbon dioxide removal (CDR) holds potential also for alleviating climatic pressures on the ocean, a range of challenges have been identified, including related specifically to governance of the technologies. The aim of this in-person two-day workshop is to look towards the future and identify opportunities within the global ocean governance regime to govern ocean-based NETs in a comprehensive manner.