The Day We Lost the H-Bomb: Cold War, Hot Nukes, and the Worst Nuclear Weapons Disaster in History

Soon afterward, Admiral Guest reported that Brad Mooney's arrival had been “like a ray of sunshine.” Finally he had someone who understood the deep ocean and knew what to do with these ridiculous submersibles. Red Moody was also impressed with the new lieutenant, even though their similar names caused confusion when read over the ship's crackling intercom. “When Brad came aboard, he was a mover and a shaker,” said Moody. “I just said, ‘Here's a guy who can get things done.’” When the accident happened, Mooney had orders to report to Pearl Harbor and then take command of a submarine. During the mission in Spain, the Navy twice attempted to send Lieutenant Mooney to his original duties. Both times, Admiral Guest arranged to keep him on.

With Red Moody overseeing the divers, Brad Mooney tackling the submersibles, and the rest of his team and gear in place, Guest hunkered down and made a plan. On February 17, 1966, he laid it out in a long letter to the chief of naval operations.

First, Guest reviewed the current situation, which was not stellar. The Decca navigation system, which was supposed to have been up and running twenty-four hours after it arrived, still wasn't fully functional. The Ocean Bottom Scanning Sonar was scanning hundreds of contacts but couldn't tell if any particular contact was a lost bomb or a school of fish. (The ships of Task Force 65 didn't help matters by regularly dumping their garbage overboard in the search area, adding paint cans, soup cans, and machine shop shavings to the sonar contacts.) Deep Jeep was useless and had been sent back to the United States.

Aluminaut had battery trouble, Alvin had sonar problems, and neither could navigate easily. Cubmarine was great, but only down to 600 feet. All in all, summarized Guest, “We enter this phase with equipment largely R&D and of marginal reliability and ruggedness.”

Then Guest laid out his four search areas. Two were top priority: Alfa 1 and Alfa 2. One, a semicircle adjacent to the beach, extended the aircraft debris pattern into the ocean. For the other, Guest located the point where Simó had seen the “dead man” and his parachute hit the ocean, then noted eleven sonar contacts nearby. He averaged those sonar hits, noted that point on the chart, and drew a one-mile-radius circle around it. Guest also identified two other areas based on Sandia calculations. These, large rectangles stretching into the sea, were named Bravo and Charlie.

Altogether, the four search areas encompassed about twenty-seven square miles of ocean. Guest had narrowed down the search area from two Manhattans to just over one. His task force would now have to sweep every inch of it for the missing bomb.

To divide these four large areas into searchable zones, Guest's team created a 132-square-mile grid system that they could lay over his charts. They first divided the area into lettered two-by-four-mile rectangles, then divided each of those into thirty-two numbered squares, each measuring 1,000 by 1,000 yards.

Guest depended on divers, sonar, and Cubmarine to handle the areas close to shore. Then, with Brad Mooney's advice, he made a plan for the submersibles. The more maneuverable

Alvin got the deeper areas near Simó's sighting, where the underwater terrain rose and fell with rugged ridges and trenches. Aluminaut was sent to cover shallower, smoother areas, a plan that irritated her crew. Like almost everyone else, they thought that Simó Orts had seen the bomb fall and wanted to search there.

Mooney understood the crew's feelings, but he had reservations about Aluminaut. Aluminum, if exposed to salt water, can suffer catastrophic failures. So, for protection, builders coated Aluminaut

with several layers of colored paint. After almost every dive, the submersible's support crew checked the hull for scratches or scars that might expose the aluminum to salt water. This vulnerability

“probably scared a lot of people from using her very much,” said Mooney. “Did me.” Such concerns annoyed the Aluminaut crew to no end. Art Markel, the manager of the Aluminaut team, thought his ship was far more capable than the Navy gave it credit for, and certainly more adept at deepwater searching than Alvin. Aluminaut was outfitted with search sonars that could read out to 800 feet, as well as a sweeping sonar that could see 2,000 feet. Alvin had nothing so elaborate.