Axis Belittled Mine Detection—Until De-Gaussing Grids Saved 1,000+ Ships from U-Boats

The Battle of the Atlantic was not won just by depth charges and torpedoes. In 1939, a terrifying, invisible threat—the German magnetic mine—threatened to paralyze Britain's essential supply lines, sinking ships without a trace and rendering traditional minesweeping useless. This is the forgotten history of how a small team of engineers and scientists, relying on a stranded mine on a muddy beach, unlocked the secret to survival.

This long-form history documentary dives deep into the genius of degaussing. We explore the fundamental physics of why every steel ship was a target, the extraordinary bravery required to recover an unexploded mine at Shoeburyness, and the engineering breakthrough that created the "invisible shield." Discover how the installation of simple degaussing grids and M-coils fundamentally countered the Axis weapon, saving thousands of ships and ensuring the victory of the Allied convoys.

This is a story of quiet, persistent engineering genius—a triumph won with coils, wires, and amps against a superior, unseen weapon.

Chapters: 0:00 - The Invisible Crisis 4:00 - Ship's Magnetic Flaw 12:00 - The Shoeburyness Miracle 17:00 - The Coiling Solution 22:00 - The Enduring Legacy




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