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October 31, 2020
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Early into World War II, the British Anti-Submarine Detection and Investigation Committee made efforts to outfit every ship in the British fleet with advanced detection devices. (sep 1, 1939 – jan 1, 1942)

Added to timeline:

8 Nov 2018
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Development of sonar Technology

Date:

sep 1, 1939
jan 1, 1942
~ 2 years and 4 months
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