Fundamentals of shipboard machinery, equipment, and engineering plants are presented in this text prepared for engineering officers. A general description is included of the development of naval ships, ship design and construction, stability and buoyancy, and damage and casualty control. Engineering theories are explained on the background of ship propulsion and steering, lubrication systems, measuring devices, thermodynamics, and energy exchanges. Conventional steam turbine propulsion plants are presented in such units as machinery arrangement, plant layout, piping systems, propulsion boilers and their fittings and controls, steam turbines, and heat transfer apparatus in condensate and feed systems. General principles of diesel, gasoline, and gas turbine engines are also provided. Moreover, nuclear power plants are analyzed in terms of the fission process, reactor control, and naval nuclear power plant. Auxiliary equipment is also described. The text is concluded by a survey of newly developed hull forms, propulsion and steering devices, direct energy conversion systems, combined power plants, central operations systems, and fuel conversion programs. Illustrations for explanation purposes are also given.