The book is an excellent guide for Marine Engineers, especially those who have just about started with a career out at sea. Lost in the confines of a never-seen-before engine room, this book brings a deep insight into the actual functioning and the ropes of maintaining machinery on a sea going vessel. Most books are written with the purpose of succeeding at the examinations for certification. This book discusses performance criteria of equipment in detail, maintenance based on those criteria with over 170 sketches, drawings and images, and troubleshooting to resolve problems faced on those rust buckets. The book emphasizes training to be a great manager, staying one step ahead of peers (and may be half a step ahead of superiors). Like they say - who needs mathematics to trace a choked filter, huh? A fun book and yet an eye-opener for those still to find their sea legs.