What invention allowed the british to know when attacks were coming

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asked Feb 15, 2019 86.4k views

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Formatc · Answer 1 · 2019-02-20T22:12:15+0000

The radar, the first radar system was produced in 1935 by the British physicist Sir Robert Watson-Watt, and by 1939 England had positioned radar stations along the east and south coasts in order to detect aggressors in the air and on the sea.

What invention allowed the british to know when attacks were coming

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