By OBBM Network Editorial Staff

Derived from an episode of Forgotten History.

Imagine a ship the size of a football field drifting in the Pacific, its massive crane silently hoisting a piece of a Soviet nuclear submarine from the abyss—while the world watches only a mining vessel on the horizon.

From Lost Sub to Secret Target

On February 24, 1968, the Soviet Gulf II‑class submarine K‑129 slipped into the northern Pacific, heading toward a patrol zone northeast of Hawaii. Carrying three nuclear‑armed ballistic missiles and a crew of roughly 98 men, the diesel‑electric vessel vanished after missed communications. The Soviet Navy launched an extensive search—over 53 aircraft and 37 ships—but found nothing.

U.S. intelligence, however, had been listening. Sophisticated underwater surveillance systems detected the submarine’s final moments, allowing a specially modified intelligence sub, USS Halibut, to locate the wreck in August 1968 at a depth of about 16,500 feet—far deeper than the Titanic.

The Glomar Explorer and Its Cover Story

To retrieve the wreck, the CIA turned to billionaire Howard Hughes, whose reputation for secretive, grand engineering projects provided the perfect veil. Hughes announced the construction of the Hughes‑Glomar Explorer, a 620‑foot vessel supposedly built to harvest manganese nodules from the ocean floor. The public narrative of deep‑sea mining concealed a massive mechanical capture vehicle hidden beneath the ship’s deck.

“If that movement traveled directly down the pipe string, the forces could destroy the recovery system,” engineers warned, prompting the development of a heavy‑compensation system that isolated the lift apparatus from the ocean’s relentless motion.

Project Azorian: Engineering the Impossible

By 1974 the Glomar Explorer was ready. The plan—codenamed Project Azorian—called for lowering a 2,400‑ton capture vehicle more than three miles to the seabed, encircling K‑129, and hoisting it toward the ship’s central moon pool. The lift system was designed to handle roughly 14 million pounds, with miles of pipe that could stretch dozens of feet under load.

On July 4, 1974, the vessel reached the recovery area. Soviet ocean‑going tugs lingered for two weeks, testing the cover, but the CIA pressed on. After a painstaking ten‑hour maneuver to position the capture vehicle around the wreck, the ascent began. The submarine rose slowly, suspended by the pipe string, but partway through the lift supporting sections gave way, and a large portion of K‑129 broke apart.

“The wreck might contain cryptographic equipment, sonar technology, anti‑submarine countermeasures, and nuclear warheads,” a classified U.S. mission proposal had warned, underscoring the high stakes of the operation.

What Was Recovered?

Only a fragment survived the catastrophic failure—a roughly 38‑foot section that settled inside the capture vehicle. The crew hauled the damaged piece into the Glomar Explorer’s moon pool, sealed the doors, and secured the Soviet hardware inside a U.S. vessel in the middle of the Pacific. Protective gear was required as workers could not immediately assess radioactive contamination.

The recovered segment yielded limited intelligence; much of the submarine’s most valuable technology remained lost to the depths. Nonetheless, the mission demonstrated that the United States could execute a covert, deep‑sea operation of unprecedented scale.

Legacy of a Hidden Mission

Project Azorian remained classified for decades, its details emerging only through declassified documents and veteran accounts. The operation illustrated the extremes of Cold War espionage, where the pursuit of hidden military secrets justified massive engineering feats and elaborate deception.

Colin D. Heaton and Michael Droberg, hosts of the Forgotten History series, guide listeners through this covert chapter, highlighting how a mining cover, a billionaire’s name, and a daring lift combined to produce one of the most audacious intelligence missions of the 20th century.

Beyond the technical marvel, the story prompts reflection on the lengths nations will go to protect and acquire strategic advantage, a theme that continues to echo in today’s geopolitical landscape.

The full episode of Forgotten History is available on OBBM Network TV.