A technique is developed which allows, for the first time, many deep water mooring systems to be experimentally modelled In tanks previously considered too shallow. Special use is made of pertinent non-dimensional parameters which describe how to artificially adjust the models masses, stiffnesses and damping. We call this new technique "Bi-Scaling. Essentially the scale factor for the vessel Is allowed to be different than the scale factor for the mooring lines (and depth). A complete set of Bi-Scaling relations for the artificial adjustments is presented and experimental verification of the Bi-Scaling technique is carried out.

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