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Knowledge of ocean circulation is necessary at operational sites in order to monitor, simulate, and predict ocean dynamics with the goal of attaining protective schemes in the planning of crises, in order to build action plans for oil spills and minimize environmental damage. The environmental assessment of potentially affected ecosystems is crucial since various environments have unique sensitivities and can sustain a variety of harms. The use of numerical computational models that estimate the ocean circulation has been constituted one of the main tools to acquire the knowledge related to space and time marine hydrodynamics variability. The Brazilian Equatorial Margin (BEM), which increased from 11 to 49 exploratory blocks in 2013 [1], has, nevertheless, recently emerged as the nation’s new frontier for this industry. Being a less studied region than those already established in the context of O&G exploration and production in Brazil, this highlights the need to further develop and organize key elements of the BEM, such as understanding of oceanic and atmospheric circulation.