Following the success of the previous international edition(s), this book, also meant for the global market, has been updated with current information and guidelines. It caters to the structured syllabi for Marine Engineering Pre-sea Students, Marine Engineers of all post-sea competency levels and Electro Technical Officers of the Merchant Navy. It can also be used as a reference book in libraries ashore and onboard ships. Comprising of 27 chapters in simple English, it explains not only the fundamentals but also the constructional features, operating principles, maintenance procedures and rules that govern the safe operation of all important electrical systems onboard a commercial ship. Extracts from SOLAS Regulations, IACS Guidelines, Lloyd’s Register, Det Norske Veritas and American Bureau of Shipping Rules, have been included with permission. Many world-class organisations and manufacturers have extended their invaluable support and enriched the content too. The Teaching Guide at the beginning of this book suggests a standard teaching methodology. The question bank, with a total of over 1100 questions, covers all topics that have been explained. This edition also contains more than 550 relevant figures, including photographs that have been contributed by leading equipment manufacturers across the world.