The Secret War Season 1, Episode 7 : Battle of the Atlantic

A detailed look into history, the technical developments and tactics used by both Allied and Axis sides during this long and difficult campaign, featuring such innovations as Asdic, Type 271 radar, Wolfpacks, Cam Fighters, Hedgehog, Huff-Duff, US Blimps, ASV radar, the Leigh light, Metox, Naval H2S radar, Schnorkels and Escort carriers.

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