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Sonar (sound navigation and ranging or sonic navigation and ranging) [2] is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. [3]
ASDIC was the primary underwater detection device used by Allied escorts throughout the war. The first versions, crude to say the least, were created near the end of World War One and further developed in the following years by the Royal Navy. How it works.
Also known as: ASDIC, Allied Submarine Detection Investigation Committee. Learn about this topic in these articles: use in World War II. In World War II: The Atlantic and the Mediterranean, 1940–41. …vessels had the ASDIC (Anti-Submarine Detection Investigation Committee) device to detect submerged U-boats.
Asdic was the British version of sonar developed at the end of World War I based on the work of French physicist Paul Langevin and Russian engineer M. Constantin Chilowsky. The system was developed as a means to detect and locate submarines by their reflection of sound waves.
The ASDIC is a sonar system for submarine detection developed by British, French and American scientists during WWI; the name is derived from that of the Anti-Submarine Detection Investigation Committee. The ASDIC emits a sound signal at regular time intervals.
ASDIC display from around 1944 in the Berlin Museum of Technology. In 1917, working under the British Board of Invention and Research, Canadian physicists Robert William Boyle and Albert B. Wood, produced a prototype active sound detection system.
Asdic, Professor Jack Anderson’, had devised what came to be known as the ‘pounce’ and ‘MRCS’ tactics, which set out to reduce the freedom of a submarine to take evasive action during the last stage of a depth-charge attack, when Asdic effectively became deaf. The ‘pounce’ attack involved the attacking
It is interesting to compare the genesis of Sonar, the U.S. Navy’s sound-ranging instrument for the detection of hostile submarines, with Asdic, the British instrument developed for the same purpose.
The original name for the underwater sound-ranging apparatus for determining the range and bearing of a submerged submarine. The name was derived from the initial letters of the Allied Submarine Detection Investigation Committee, which was set up as an Anglo-French project immediately after the end of the First World War (1914–18).
The Ancestral Asdic. by William Schleihauf. ASDIC, now better known by the American term sonic waves in the water and thereafter detected any SONAR, was and remains to this day the most im- returned echoes (see Figures 1-3).