 The hull form, which is patented and which was first featured on a project that was begun in 2009, has shown resistance values that are 15 to 20 per cent better than those of well-designed hard chine hull forms at semi-displacement speeds.Other benefits include significantly increased onboard comfort, with better sea-keeping and wave reduction than more conventional hull forms.The Wolfson Unit test tank facility compared the FDHF hull to other round bilge hull forms between a cruising speed of 15 knots and almost planing speeds 44 knots, stating that ‘…the design is currently ranked as the most efficient in the Wolfson Unit’s database’.