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  • Maritime History


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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 invention was mainly French in conception. It is now known as sonar.

Subjects: Warfare and Defence — Maritime History.

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