Illustration by Ray Quigley shows an anti-sub device from 1950 termed “the hedgehog.”

It lobbed multiple depth charges all at once at the presumed submarine location.  Charges were slightly angled so that they would land in a spreadout, scattershot pattern, covering a wider range.

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Ship-Based Anti Submarine Defense Cutaway, 1950

Ship-Based Anti Submarine Defense Cutaway, 1950

Source:  Popular Science March 1950

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