In the years after World War II, the U.S. Navy faced a new kind of threat. The kamikazes were gone, but the sky itself had become the enemy. Long before satellites and airborne warning planes, the Navy turned to an unlikely solution. It pulled its old fleet submarines out of mothballs and refitted them with radar, turning hunters of the deep into sentinels of the sky.

These were the radar picket submarines, known by the mysterious designation SSR. They formed a short but fascinating chapter in Cold War history, watching for danger from beneath the waves. In this episode, we’ll explore how the program called Project Migraine transformed boats like USS Requin and USS Burrfish into the Navy’s earliest early-warning systems. It’s the story of ingenuity, frustration, and adaptation in an age when America’s eyes had to look not just across the seas, but far above them.

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