The effect of High Speed Craft (HSC) motions on the passengers and crew is becoming of increased interest to designers and operators of these craft. The reasons are numerous and some of them are: increased speed of high speed craft, increased applications in commercial, rescue and military sectors, advances in structural design, etc. In this perspective, exposure of crew and passengers to a Repeated Shock (RS), Whole Body Vibration (WBV) and Motion Sickness Incidence (MSI) are becoming physical limits of crew and therefore the limit for high speed craft operation, especially in waves. Analysis of WBV and MSI includes Vibration Dose Value (VDV) and Vomiting Incidence (VI) respectively, both of them actually embodied in ISO Draft International Standard 2631-1:1997.

This paper focuses on determination of VDV and MSI values from experimental motions and accelerations measured on warped deep V planing hull form. A 1:10 scale model has been tested at two speeds in head seas described by JONSWAP spectra at Towing Tank of University of Naples “Federico II”. Very high sampling frequency provided precise motion and acceleration values to apply as reliable input for VDV and MSI determination. Conclusions highlight the influence of fundamental design parameters on the seakeeping performance of the hulls and human factors performance of the crew, with an aim to provide the applicability of these data in design practice.