The main objective of the MyOcean Follow On project will be to operate a rigorous, robust and sustainable Ocean Monitoring and Forecasting component of the pre-operational Copernicus Marine Service delivering ocean physical state and ecosystem information to intermediate and downstream users in the areas of marine safety, marine resources, marine and coastal environment and weather, climate and seasonal forecasting. This is highly consistent with the objective of the HORIZON 2020 Work Programme 2014-2015 establishing the need for interim continuity of the pre-operational services developed by MyOcean 2 before the fully operational services of Copernicus. The project proposes to sustain the current pre-operational marine activities until March 2015 in order to avoid any interruption in the critical handover phase between pre-operational and fully operational services. In effect, any significant interruption in these services could potentially jeopardize several important high-level policy objectives and undermine other related scientific activities. In the period from October 2014 to March 2015, MyOcean-FO will ensure a controlled continuation and extension of the services already implemented in MyOcean and MyOcean2 FP7 projects that have advanced the pre-operational marine service capabilities. To enable the move to full operations, MyOcean-FO is targeting the prototype operations, and developing the management and coordination to continue the provision of Copernicus Marine service products and the link with independent R&D activities. MyOcean-FO will produce and deliver services based upon the common-denominator ocean state variables that are required to help meet the needs for information for environmental and civil security policy making, assessment and implementation. MyOcean-FO is also expected to have a significant impact on the emergence of a technically robust and sustainable Copernicus Service infrastructure in Europe.