This report focuses on demonstrating the usefulness of the advancements in the observing and modelling systems through the co-design of applications, which aid three Environmental and Societal Challenges (ESCs). This report provides an overview of the various applications designed as part of each ESC:- Design of applications to better manage and protect the coastal area (ESC 1).- Design of applications to enhance the blue economy (ESC 2).- Design of application related to natural and anthropogenic hazards and resilience to climate change (ESC 3).The report is divided into two sections, where each subsection in Section 2 maps the individual applications dedicated to a specific ESC. Each application description outlines the application objective, the usage and value of observations, land-ocean models and Member State Coastal System improvements, the expected outputs, fit for purpose validation and end users. Section 3 describes the next steps and common challenges which will be given attention.