The features and difficulties of the craft design as well as the experimental investigation of DACWIG (Dynamic Air Cushion Wing-in-ground Effect Craft) are described in this paper. Both model and full scale craft tests demonstrated that the static hovering characteristics, powering performance, seakeeping quality and aerodynamics balance as well as transverse and longitudinal stability of the craft were satisfied, due to taking a series measures in the craft design. So DACWIG has prospective future in both civilian and military use.