User Guide In this User Guide, we introduce the fundamentals of working with NEMO model outputs and provide detailed descriptions and examples of how to leverage NEMO Cookbook in your ocean analysis workflows. Terminology NEMO Fundamentals NEMO Ocean Engine Curvilinear Coordinate Systems Discrete Operators Model Discretisation Data Structures NEMODataTree NEMODataArray Core Operations Combining Indexing Clipping Masking Discrete Operators Statistics Transformations Extracting Plotting