This book is intended for the use of students at shipbuilding institutes and may also serve as a text for research and design engineers engaged in ship construction. The book treats the problems concerned with the buoyancy and stability of a complete and damaged ship encountered by the naval architect in the design, building and operation of ships. It presents the theory of the subject matter and the methods of calculations employed in ship construction. The technique of calculations is illustrated by numerical examples in a number of cases. In distinction to other books dealing with the problems of buoyancy and stability of ships, this text covers both static and dynamic effects. Some theoretical propositions and calculations have been developed by the author and are published in the world naval literature for the first time. Vladimir Semyonov-Tyan-Shansky, Doctor of Technical Sciences, is professor and head of the Department of Naval Architecture at the Leningrad Shipbuilding Institute. Dr. Semyonov-Tyan-Shansky is conducting wide research work in the field of theoretical naval architecture, applied hydromechanics and theoretical mechanics. He has worked out some problems of the theory of buoyancy and stability of ships with consideration of static and dynamic effects which is an important contribution to the theory of naval architecture. Dr. Semyonov-Tyan-Shansky is the author of several books and a large number of scientific papers and reports. The main of these are the following: Statics of the Ship, Short Course in Theory of Ship, and Statics and Dynamics of the Ship.