Written at a level suitable for senior students of marine engineering and entry level marine engineers, this book covers main propulsion machineries, auxiliaries, and all ship-board systems and equipments that come under the purview of a marine engineer. The chapters progress from working principles to construction and design features to operation and maintenance. A separate chapter covers inherent hazards in a running engine as well as the built-in safety features and fail-safe devices to combat it. Copious line drawings and composite diagrams demonstrate the concepts and intricacies of design. An added feature is the section on watch-keeping, since that is truly a test of skill and competence of a sailing engineer.