The United States fast-attack nuclear submarine USS Columbiawas shallow as she attempted to gather readings from the air and water surrounding the boat. Then the large sub went back into deep water to evaluate their readings.

The Los Angeles class submarine had been on maneuvers with one of the newest Ohio-class missile boats, USS Maine(SSBN 741) while they conducted DSEM (Deep Submergence Evasive Maneuvering), a new drill thought up by COMSUBLANT (Commander, Submarine Force, U.S. Atlantic Fleet).

The Columbia, normally based in Hawaii, had recently finished a scheduled refit at Newport News, Virginia, at the general dynamics facility. From there she was ordered to conduct operations with Maineon her return trip back around the Horn of South America. The drill suddenly halted when the waters fifty kilometers to the south erupted in sound. While the Mainewent deep and evacuated the area for security reasons, the Columbiawent south at flank speed to investigate the war noises emanating somewhere off the coastline of Venezuela.

Captain John Lofgren watched the readings on the infrared detectors and frowned. He turned to his first officer, Lt. Commander Richard Green, and shook his head.

"Whatever happened up there, it was hot as hell. The water temperature is twenty degrees above normal. Moreover, what were those strange noises prior to all hell breaking loose? They weren't any torpedo sounds I've ever heard before."

"We have confirmation, Captain," the chief of the boat called out. "We have elevated but still low radiation readings on the surface. Computers still say nuclear detonation, probably light in yield."

"We're also picking up elevated levels of airborne contaminate coming in from the west," a second tech called from his station.

"What in the hell is going on?" Lofgren asked as he returned to control. "Dick, we have to get this off to COMSUBLANT--let's get Columbiaup to periscope depth."

TWO HOURS LATER

Captain Lofgren was holding the set of headphones to his ears as he listened inside of the BQQ-5E sonar suite.

"I still don't hear a thing," he said to his sonar team.

"It's there, Captain, five miles outside of the target area. Just as we were approaching station it passed right beneath us," Petty Officer John Cleary said as he adjusted the volume control to the captain's headset.

"Tell me again what in the hell it's supposed to be I'm listening for?"

The young petty officer seemed lost for words again as he looked from his captain to the first officer standing just inside the curtain of the sonar station.

"It's like ... like ... a pressure wave of some kind, and it's moving extremely fast. The only thing that can cause something like that is a large object moving through the sea. We hear the same thing with whales, only on a smaller scale."

"I just don't hear it."

"How fast did you say it was moving again?" the first officer asked.

This time the operator looked at his training partner, who had also failed to hear the strange noise. He swallowed, then looked at the two officers.

"About seventy-six knots. I measured the speed of the pressure wave against our static location."

Lofgren removed the headphones and looked at the operator, but Cleary kept his eyes straight ahead, not flinching away from his captain's questioning look.

"Captain, it went to almost eighty knots speed after I detected it, and at the moment it passed beneath us I felt the boat ..." He stopped, knowing the explanation would sound too amazing to believe.

"Felt the boat what?"

"I have the computer and depth track on paper to back me on this, Captain."

Lofgren didn't say anything as he waited.

"Columbiaactually rose in depth by eight feet as water under our keel was displaced by whatever it was that plowed beneath us when we came into the affected area." The sonar man pulled a graph and showed it to the two officers. "One minute we're at three hundred and three feet of depth, the next we went to two hundred and ninety-five--a difference of eight feet. Something monstrous passed beneath our keel at that exact time. What could move a Los Angeles class boat by that much depth from that far away?"

The first officer raised his eyebrows and looked at Lofgren.

"I guess it would have had to have been big to shove aside that much water. Are you sure the object was that deep?"

Again, the young man was hesitant to answer. "Captain, it was so deep that ..." He saw the impatience showing on both officers' faces. "About fifteen hundred feet at first contact."

"Fifteen hundred feet of depth and then it suddenly sprang like a cheetah up to seventy-five knots? I can't buy that, Cleary. Not even the Russians have anything remotely close to half that," the first officer said.

"Write it up, Cleary, and get it to me. We'll bait the hook and send it out and see if anyone at COMSUBLANT bites."

As Captain Lofgren returned to the conn, he half-turned to his first officer.

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