During World War I, the only underwater detection device in use was the hydrophone – a passive listening set. In June 1917, the British Admiralty and the Royal Navy embarked ...
Anti-submarine training
Book Review: Contact!
Title: “CONTACT! HMAS RUSHCUTTER and Australia’s Submarine Hunters 1939 -1946.” The disproportionate contribution of Australia to Allied victory in World War II, bearing in mind her limited resources, is common knowledge. ...