Model testing of marine platforms has always focused on preserving geometric similitude and Froude number. While Froude scaling does provide a good approximation to true dynamic similitude, there are viscous effects which are not scaled. Additionally, the dynamic testing of small high speed marine craft presents difficulties due to their small size, so while one would prefer to minimize these effects by testing large models, model basin characteristics limit the physical size of the models that can be tested. These issues as they relate to model testing, including sea state scaling and scale effects, are discussed.

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