The oceans represent 90% of the Earth’s biosphere and are essential to a range of economic activities with over 90% of world trade travelling via maritime routes. The oceans also play a central role in regulating the Earth’s climate. Global observation and monitoring systems are therefore essential to better manage the oceans and to achieve a sustainable blue economy. A dedicated session at EU Space Week on 6 December highlighted how the Galileo and Copernicus programmes contribute to the sustainable management of our oceans and provide support for maritime operations.