When Ulstein designed the newly delivered National Geographic Endurance from Lindblad expeditions, they chose SSPA as the hydrodynamic testing partner. Ulstein ran an extensive model test program in calm water and waves which supported their advanced CFD simulations of this state-of-the art-vessel. Ulstein has now revealed great pictures from the development phase. The renderings they have published illustrates how a thoroughly validated CFD model can capture the flow features in detail, but also how essential it is to run model tests to fully trust the CFD predictions. A meticulously validated CFD model can be used to explore in further details the results from model testing and to gain even more insight in full confidence.