Intended for the general reader, this is a plea for better understanding of the facts about naval warfare in order to support security measures, Ships and bases need trained personnel -- the cost of unpreparedness is high. Here is a summary of the history of war, of weapons, of ships, of battles. Here is a discussion of the tactics of shore installations, base planning, harbor defense, employment in naval warfare, amphibious warfare, engineering problems, staff work, logistics, etc. He carefully avoids any implication of personal bias, speaking only rarely of specific officers. He presents sample problems in planning and execution of plans to illustrate his points. He feels we have reached the twilight of carriers, as such, and presents the ideal ship-a combination of a battleship and a carrier, in one. This is primarily a book for students of strategy and tactics, of naval warfare -- and for armchair admirals.