Скачать или смотреть The Day The Allies Built Steel Nets And Sealed Off An Entire Harbor Against German U-Boats

Uncover the forgotten technology that turned Allied harbors into underwater fortresses. After a German U-boat brazenly slipped into a British naval base and sank a battleship, the Allies realized their 'safe' harbors were wide open. Their solution was a brute-force marvel: massive underwater steel nets, strong enough to stop a submarine in its tracks. This meticulously researched historical documentary reveals how the Royal Navy's Boom Defence Department deployed thousands of tons of steel. Following the sinking of HMS Royal Oak by Günther Prien's U-47 in October 1939, engineers created nets with steel rings as thick as a man's arm, supported by 60-ton buoys, and operated by special 'Gate Ships'. From the shocking disaster at Scapa Flow to the successful implementation of this colossal system in harbors from Sydney to San Francisco, witness how this simple concept secured the Allied war effort...proving that sometimes the most effective defense isn't a complex weapon, but a simple, unbreakable wall—a principle still fundamental to naval base security today.

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