The semiplaning hull has been applied to various medium and small tonnage boats . resistance prediction methods of planning ( semiplaning ) hulls generally fall into the following categories : planing hulls series , prismatic equations and some theoretical methods 半滑行船型在中小吨位船舶上已经得到了广泛的应用,对它的研究方法主要是以统计资料、船模试验和各种半经验半理论方法为主。