Abstract: This book deals with the prediction of speed and power in ships - an important part of ship design - and describes the techniques used in ship model experiments as well as different types of experimental facilities. It considers different methods of estimating or determining speed and power. Questions regarding wake, thrust deduction, cavitation, and propeller design are covered. The book correlates the interaction between ship, machinery and propeller, and includes a thorough exposition of shipyards' and shipowners' needs for model testing.