This is the only design book available which includes the complete design and engineering process for both power and sail. This book will help you to understand why your boat was designed and built as you see it now. It will explain why your boat has certain handling characteristics, both positive and negative. Why does my boat rock so uncontrollably in rough seas? You will soon have the answers and possible solutions to this and hundreds of other questions. The professional designer will learn from the new formulas (developed by the author after years of research) for finding hull design pressure and speed predictions. Hull thickness and scantling size tables for Glass Fibre, Steel, Aluminium, Wood and Ferro-cement are also included. This information is provided in this and no other design book published today. This book will start the novice designer on their way to the fascinating realm of boat design. Written in terms anyone can understand with formulas, tables, line drawings and illustrations to explain the process of design in great detail.