The topic is on the scientific importance of instrumenting our ocean, with a particular focus on biogeochemical measurements which are needed to describe key issues and phenomena of societal interest, e.g. carbon cycle, ocean acidification, deoxygenation, harmful algal blooms. Through a lecture, you will be introduced to the Framework for Ocean Observing and the concept of Essential Ocean Variables as a means of globally setting requirements for sustained ocean observations. Maciej Telszewski (IOCCP Director) talks about the importance of developing the global network of marine biogeochemistry observations using autonomous platforms on top of the more traditional ship-based and fixed-point observations. Presenting the vision for an integrated Global Ocean Observing System that delivers essential ocean information to the society, the talk will emphasize the need for multi-platform and multi-disciplinary approach to observations.