THE FINAL SECRET OF THE USS SCORPION
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Radioman 2nd Class Mike Hannon walked to work with a palpable sense of unease on the morning of May 23, 1968. As a communications specialist at Submarine Force Atlantic Headquarters, he was responsible for processing dozens of messages each day from submarines at sea, ranging from routine announcements to top-secret operational dispatches. But hours earlier, when his eight-hour shift had ended at midnight, Hannon feared that one of the submarines on his watch might be in trouble—or worse.
Hannon feared that one of the submarines on his watch might be in trouble—or worse.
The Norfolk-based USS Scorpion, one of the Atlantic Fleet’s 19 nuclear attack submarines, had been scheduled to transmit a four-word “Check Report”—encrypted to prevent the Soviets from intercepting it—that meant, in essence, “Situation normal, proceeding as planned.” In this instance, the Skipjack-class submarine was returning to Norfolk after a three-month deployment to the Mediterranean Sea. Its standing orders called for a burst transmission every 24 hours that, when decrypted, read: “Check 24. Submarine Scorpion.” But the previous day no message had come clattering out of the secure teletypewriter that Hannon used. As he prepared to leave for the night, Hannon had briefed Radioman 2nd Class Ken Larbes, the petty officer coming on duty, about the overdue message. He then tapped on his supervisor’s office door and asked whether any late word had come in from the Scorpion. Warrant Officer John A. Walker Jr. silently shook his head no. Was this the first hint of an emergency, Hannon wondered, or merely a delayed transmission caused by mechanical problems or stormy weather conditions?
Assigned to the message center at Submarine Force Atlantic (COMSUBLANT) headquarters in Norfolk, Hannon and a handful of other young sailors were responsible for processing all incoming and outgoing messages for submarines then operating with the Atlantic Fleet. They worked in a large room full of top-secret encryption machines that took clear-text messages, scrambled them into impenetrable gibberish, and then dispatched the blocks of seemingly random text in Morse code via high-frequency radio to submarines at sea. The radiomen reversed the process for incoming messages, taking encrypted transmissions from the submarines and “breaking” them back into clear text by using the same encryption gear. “All messages, incoming or outgoing, were routed through my desk,” Hannon recalled years later. “Nothing came in or went out that didn’t go through that desk.”
During the five-minute walk from his barracks to the COMSUBLANT message center that Thursday, May 23, Hannon was unsure what he would find. As usual, he thought about the abrupt change in atmosphere he and his coworkers encountered each time they went on duty. Walking up to the unassuming brick building, they would show their ID cards
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