An essential new account of how anti-submarine warfare is conducted, with a focus on both historic and present-day operations. 'An extremely well researched and balanced work, The Royal Navy and Anti-Submarine Warfare, 1917-49 is a refereshing look at a complex subject, from the eyes of a seasoned professional, and sheds light on some popular misunderstanding as to the complexity of modern ASW...a key reference document for naval historians and future maritime strategists.' - The Northern Mariner