There is another source that can be more economical, and that is the NIST Manufacturing Extension Partnership program. Visit the website http://www.mep.nist.gov/about-mep/center-info.html for more information.
They provide training and on-site assistance.
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The biggest factor will be the wetted surface area - the Reynolds' number calculation will determine the most efficient design relative to propulsion requirements.
However, ship design also needs consideration of the operating conditions of the vessel. Where will the vessel be normally...