The present study describes the verification methods and accuracy assessment procedures, provided by ASME guide, of sailing yacht performance prediction program useful in order to the develop better and more efficient racing sailboat. To this end the numerical results of the Velocity Prediction Program (VPP) are compared with the feedback provided by the instruments used for the experimental data acquisition, which come from the sensors installed on a skiff designed and built by Polito Sailing Team. The goal is to determine how close is the simulation output with the real one. The main output of a VPP is a performance diagram (polar plot) that states the boats optimal target speed as a function of the sailing conditions.