This latest seventh release of one the most recognized books on marine auxiliary machinery has been thoroughly revised - some of the old materials have been removed while several new chapters were added that reflect the intention of the author to make the present book maximum relevant to the current COC (certificate of competency) examinations. The author hopes that the drawings that he has included in his book will be of helpful to anyone preparing to the COC as well and other exams. All of the previous releases of this publication have already proven to be so successful and that was the reason of their extreme popularity among both industry professionals and students worldwide. The textbook opens with the chapter describing the main propulsion services together with the heat exchangers, followed by the chapter addressing the machinery service systems together with the associated equipment. Then the chapters come covering the ship service systems, their components, such as pumps and all pumping arrangements, valves and piping, cargo pumps, various systems installed on board tankers and gas carriers, auxiliary power plants, steering arrangements, refrigeration installations, propeller shafts, bow thrusters, stabilizing systems, cargo equipment, deck machinery, fire protection, heating and ventilation, and other important matters.