This popular science encyclopedic reference book examines in detail the history of the emergence, development and combat use of armored ships of squadron combat, coastal defense battleship and seaworthy monitors. For the first time in world literature, all ships of these classes without exception are presented in one volume. Their tactical and technical characteristics are given, the fate of each ship and its design features are described. Of particular value to the book is the rich illustrative material - over one and a half thousand unique photographs and drawings. The encyclopedia is designed for a wide range of readers interested in the history of military shipbuilding and war at sea.