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Questions tagged [asdic]

Questions related to the history of ASDIC, aka SONAR, the principle means of underwater detection developed during WWI and used extensively through WWII for ant-submarine warfare.

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Why wouldn't an ASDIC work immediately after a depth charge attack?

I'm reading about the WW2 North Atlantic submarine war. In particular about the anti-submarine weapons availbale to the allies. This article includes a statement that I'm trying to understand..... ...
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