Austrian submarines of World War I were known as "U-boot", an abbreviation of Unterseeboot. This book details the history of the development and operational use by the Austro-Hungarian navy of submarines in WWI. German use of submarines in WW1 is well known - this is the fascinating and little-known history of their major ally's activities in undersea warfare. Contains descriptions and specifications of all the boats involved. Profusely illustrated with scale drawings and many rare photos.