This book examines origin, history and organization of these great Naval Powers into the 21st century. The book is designed to meet the needs of general readers as well as specialists. While it provides basic know how to the trainees, journalists and general readers, it also describes how these great naval powers have brought about and incorporated innovations in technology, logistics, command, control and even their organizations into their programs. It contains latest information for the policy makers, defense forces and specialists working on the subject. Hence a book for every library and for general readers as well as specialists.