straight in, with the other two following automatically. The target area grew closer. Eight hundred meters, seven, six…
"I have you both," the officer said. A moment later the sonar picture showed the confused jamming from the American Nixie decoy, which mimicked the ultrasonic frequencies of the torpedo seeker-heads. Another feature built into the new ones had a powerful pulsing magnetic field to trick the under-the-keel influence-exploders the Russians had developed. But the Mark 50 was a contact weapon, and by controlling them with the wire, he could force them to ignore the acoustical interference. It wasn't fair, wasn't sporting at all, but then, who ever said war was supposed to be that way? he asked the director, who did not answer.
It was a strange disconnect of sight, sound, and feel. The ship hardly shuddered at all when the first column of water leaped skyward. The noise was unmistakably real, and, coming without warning, it made Sanchez jump on the port-after corner of the island. His initial impression was that it hadn't been all that bad a deal, that maybe the fish had exploded in Johnnie Reb's wake. He was wrong.
The Japanese version of the Mark 50 had a small warhead, only sixty kilograms, but it was a shaped charge, and the first of them exploded on the boss of number-two propeller, the inboard postside shaft. The shock immediately ripped three of the screw's five blades off, unbalancing a propeller now turning at a hundred-thirty RPM. The physical forces involved were immense, and tore open the shaft fittings and the skegs that held the entire propulsion system in place. In a moment the aftermost portion of the shaft alley was flooded, and water started entering the ship through her most vulnerable point. What happened forward was even worse.
Like most large warships, John Stennis was steam-powered. In her case two nuclear reactors generated power by boiling water directly. That steam went into a heat exchanger where other water was boiled (but not made radioactive as a result) and piped aft to a high-pressure turbine. The steam hit the turbine blades, causing them to turn much like the vanes of a windmill, which is all the turbine really was; the steam was then piped aft to a low-pressure turbine to make use of the residual energy. The turbines had efficient turning rates, far faster than the propeller could attain, however, and to lower the shaft speed to something the ship could really use, there was a set of reduction gears, essentially a shipboard version of an automobile transmission, located between them. The finely machined barrel-shaped wheels in that bit of marine hardware were the most delicate element of the ship's drivetrain, and the blast energy from the warhead had traveled straight up the shaft, jamming the wheels in a manner that they were not designed to absorb. The added asymmetrical writhing of the unbalanced shaft rapidly completed the destruction of the entire Number Two drivetrain. Sailors were leaping from their feet with the noise even before the second warhead struck, on Number Three.
That explosion was on the outer edge of the starboard-inboard propeller, and the collateral damage took half a blade off Number Four. Damage to Number Three was identical with Number Two. Number Four was luckier. This engine-room crew threw the steam controls to reverse with the first hint of vibration. Poppet valves opened at once, hitting the astern-drive blades and stopping the shaft before the damage got as far as the reduction gears, just in time for the third torpedo to complete the destruction of the starboard-outboard prop.
The All-Stop bell sounded next, and the crewmen in all four turbine rooms initiated the same procedure undertaken moments earlier by the crew on the starboard side. Other alarms were sounding. Damage-control parties raced aft and below to check the flooding, as their carrier glided to a lengthy and crooked halt. One of her rudders was damaged as well.
"What the hell was that all about?" one engineman asked another.
"My God," Sanchez breathed topside. Somehow the damage to Enterprise, now two miles away, seemed even worse than that to his ship. Various alarms were still sounding, and below on the navigation bridge, voices were screaming for information so loudly that the need for telephone circuits seemed superfluous. Every ship in the formation was maneuvering radically now. Fife, one of the plane-guard 'cans, had reversed course and was getting the hell out of Dodge, her skipper clearly worried about other possible fish in the water. Somehow Sanchez knew there weren't. He'd seen three explosions aft on Johnnie Reb and three under Enterprise's stern.
"Smithers, come with me."
"Sir, my battle-station—"
"They can handle it without you, and there's nothing much to look out for now. We're not going much of anywhere for a while. You're going to talk to the Captain."
"Jesus, sir!" The exclamation was not so much profanity as a prayer to be spared that ordeal.
The CAG turned. "Take a deep breath and listen to me: you might be the only person on this whole goddamned ship who did their job right over the last ten minutes. Follow me, Smithers."
"Shafts two and three are blown away, Skipper," they heard a minute later on the bridge. The ship's CO was standing in the middle of the compartment, looking like a man who'd been involved in a traffic accident.
"Shaft four is damaged also…shaft one appears okay at the moment."
"Very well," the skipper muttered, then added for himself, "What the hell…"
"We took three ASW torps, sir," Sanchez reported. "Seaman Smithers here saw the launch."
"Is that a fact?" The CO looked down at the young seaperson. "Miss, you want to sit over in my chair. When I'm finished keeping my ship afloat I want to talk to you." Then came the hard part. The Captain of USS John Stennis turned to his communications officer and started dialling a signal to CincPacFlt. It would bear the prefix NAVY BLUE.
"Conn, Sonar, torpedo in the water, bearing two-eight-zero, sounds like one of their Type 895," "Junior" Laval reported, not in an overly excited way. Submarines were regularly shot at by friends.
"All ahead flank!" Commander Kennedy ordered. Exercise or not, it was a torpedo, and it wasn't something to feel comfortable about. "Make your depth six hundred feet."
"Six hundred feet, aye," the chief of the boat replied from his station as diving officer. "Ten degrees down-angle on the planes." The helmsman pushed forward on the yoke, angling USS Asheville toward the bottom, taking her below the layer.
"Estimated range to the fish?" the Captain asked the tracking party.
"Three thousand yards."
"Conn, Sonar, lost him when we went under the layer. Still pinging in search mode, estimate the torpedo is doing forty or forty-five knots."
"Turn the augmenter off, sir?" the XO asked.
Kennedy was tempted to say yes, the better to get a feel for how good the Japanese torpedo really was. To the best of his knowledge no American sub had yet played against one. It was supposedly the Japanese version of the American Mark 48.
"There it is," Sonar called. "It just came under the layer. Torpedo bearing steady at two-eight-zero, signal strength is approaching acquisition values."
"Right twenty degrees rudder," Kennedy ordered. "Stand by the five-inch room."
"Speed going through thirty knots," a crewman reported as Asheville accelerated.
"Right twenty-degrees rudder, aye, no new course given."
"Very well," Kennedy acknowledged. "Five-inch room, launch decoy now-now-now! Cob, take her up to two hundred!"
"Aye," the chief of the boat replied. "Up ten on the planes!"
"Making it hard?" the executive officer asked.
"No freebies."
A canister was ejected from the decoy-launcher compartment, called the five-inch room for the diameter of the launcher. It immediately started giving off bubbles like an Alka-Seltzer tablet, creating a new, if immobile, sonar target for the torpedo's tracking sonar. The submarine's fast turn created a "knuckle" in the water, the better to confuse the Type 89 fish.