"The Submarine and Anti-Submarine Warfare" is a research book by the famous author Sir Henry John Newbolt, which is devoted to the study of modern technologies in the field of submarines and methods of combating them. The author examines in detail the history of the development of underwater technology, strategic aspects of the use of submarines in military affairs, as well as methods of destruction and defense against them. The book "Submarine and Anti-Submarine Warfare" is not only an important source of information for specialists in the field of naval operations, but will also be of interest to a wide range of readers who are interested in the history of technology and the secrets of the underwater world. The author draws attention to the current problems of safety at sea and shows the importance of developing the latest means of detecting and combating underwater threats. "Submarine and Anti-Submarine Warfare" is a book that will allow the reader to better understand the complexity of modern military conflicts and the importance of effective control over the underwater component of military strategy.