In World War II, the British built massive concrete disc-like structures along the coast to serve what purpose?

Question

Before radar was invented, the British developed a system of placing large concrete parabolic acoustic mirrors along the coast. These sound reflectors would alert them of any invading aircraft in advance because the sound would be caught by one and bounced off of them all.

Asked by Jennifer Sinclair · Last updated 5 years ago · 7.2K views · SOURCE

Answer 1

So they could hear enemy planes approaching

In World War II, the British built massive concrete disc-like structures along the coast to serve what purpose?

Answer So they could hear enemy planes approaching

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