Book excerpt: The implementation of operational oceanography in the past 15 years has provided many societal benefits and has led to many countries adopting a formal roadmap for providing ocean forecasts. Continuing the tradition of two very successful international summer schools held in France in 2004 (Chassignet and Verron, 2006) and in Australia in 2010 (Schiller and Brassington, 2011), a third international school that focused on frontier research in operational oceanography was held in Majorca in 2017. In the coming years, graduate students and young scientists will be challenged by many new observations (SWOT, Sentinel, AUVs, floats, etc.), complex high resolution numerical models and data assimilation (high resolution, predictability, uncertainty, changing computing platforms, etc.), and the need to work on many scales (open ocean-shelf interactions, coupled ocean-ice-atmosphere, biogeochemistry, etc.). The latter school brought together senior experts and young researchers (pre- and post-doctorate) from across the world and exposed them to the latest research in oceanography, specifically how it will impact operational oceanography. This book is a compilation of the lectures presented at the school and presents a summary of the current state-of-the-art in operational oceanography research. About the Editors: Eric P. Chassignet is a professor of Physical Oceanography in the Department of Earth, Ocean and Atmospheric Science and director of the Center for Ocean-Atmospheric Prediction Studies at Florida State University (Tallahassee, FL, USA). Ananda Pascual is a research scientist at the Instituto Mediterráneo de Estudios Avanzados, IMEDEA(CSIC-UIB) in Esporles (Majorca, Spain). Joaquin Tintore is professor of Physical Oceanography at IMEDEA and director of SOCIB (Sistema d'Observacio iPredictio Coastaner de les Iles Balears) in Palma (Majorca, Spain). Jacques Verron is a senior research scientist emeritus at the Institut des Geosciences de l'Environnement (IGE) (Grenoble, France). About GODAE OceanView: GODAE OceanView provides coordination and leadership in consolidating and improving global and regional ocean analysis and forecasting systems on an international level. It encourages international collaboration to address the scientific and technical challenges associated with operational oceanography. It also fosters research that will lead to the enhancement of existing systems and the development of next generation of ocean prediction systems.