by Tom Clancy
The U.S. Naval Academy
The loss of his left leg above the knee had not taken away Oliver Wendell Tyler’s roguish good looks or his zest for life. His wife could testify to this. Since leaving the active service four years before, they had added three children to the two they already had and were working on a sixth. Ryan found him sitting at a desk in an empty classroom in Rickover Hall, the U.S. Naval Academy’s science and engineering building. He was grading papers.
“How’s it goin’, Skip?” Ryan leaned against the door frame. His CIA driver was in the hall.
“Hey, Jack! I thought you were in England.” Tyler jumped to his foot — his own phrase — and hobbled over to grab Ryan’s hand. His prosthetic leg ended in a square, rubber-coated band instead of a pseudo-foot. It flexed at the knee, but not by much. Tyler had been a second-squad All American offensive tackle sixteen years before, and the rest of his body was as hard as the aluminum and fiberglass in his left leg. His handshake could make a gorilla wince. “So, what are you doing here?”
“I had to fly over to get some work done and do a little shopping. How’s Jean and your…five?”
“Five and two-thirds.”
“Again? Jean ought to have you fixed.”
“That’s what she said, but I’ve had enough things disconnected.” Tyler laughed. “I guess I’m making up for all those monastic years as a nuc. Come on over and grab a chair.”
Ryan sat on the corner of the desk and opened his briefcase. He handed Tyler a folder.
“Got some pictures I want you to look at.”
“Okay.” Tyler flipped it open. “Whose — a Russian! Big bastard. That’s the basic Typhoon configuration. Lots of modifications, though. Twenty-six missiles instead of twenty. Looks longer. Hull’s flattened out some, too. More beam?”
“Two or three meters’ worth.”
“I heard you were working with the CIA. Can’t talk about that, right?”
“Something like that. And you never saw these pictures, Skip. Understood?”
“Right.” Tyler’s eyes twinkled. “What do you want me not to look at them for?”
Ryan pulled the blowups from the back of the folder. “These doors, bow and stern.”
“Uh-huh.” Tyler set them down side by side. “Pretty big. They’re two meters or so, paired fore and aft. They look symmetrical through the long axis. Not cruise missile tubes, eh?”
“On a boomer? You put something like that on a strategic missile sub?”
“The Russkies are a funny bunch, Jack, and they design things their own way. This is the same bunch that built the Kirov class with a nuclear reactor and an oil-fired steam plant. Hmm…twin screws. The aft doors can’t be for a sonar array. They’d foul the screws.”
“How ’bout if they trail one screw?”
“They do that with surface ships to conserve fuel, and sometimes with their attack boats. Operating a twin-screw missile boat on one wheel would probably be tricky on this baby. The Typhoon’s supposed to have handling problems, and boats that handle funny tend to be sensitive to power settings. You end up jinking around so much that you have trouble holding course. You notice how the doors converge at the stern?”
“No, I didn’t.”
Tyler looked up. “Damn! I should have realized it right off the bat. It’s a propulsion system. You shouldn’t have caught me marking papers, Jack. It turns your brain to Jell-O.”
“Propulsion system?”
“We looked at this — oh, must have been twenty some years ago — when I was going to school here. We didn’t do anything with it, though. It’s too inefficient.”
“Okay, tell me about it.”
“They called it a tunnel drive. You know how out West they have lots of hydroelectric power plants? Mostly dams. The water spills onto wheels that turn generators. Now there’s a few new ones that kind of turn that around. They tap into underground rivers, and the water turns impellers, and they turn the generators instead of a modified mill wheel. An impeller is like a propeller, except the water drives it instead of the other way around. There’s some minor technical differences, too, but nothing major. Okay so far?
“With this design, you turn that around. You suck water in the bow and your impellers eject it out the stern, and that moves the ship.” Tyler paused, frowning. “As I recall you have to have more than one per tunnel. They looked at this back in the early sixties and got to the model stage before dropping it. One of the things they discovered is that one impeller doesn’t work as well as several. Some sort of back pressure thing. It was a new principle, something unexpected that cropped up. They ended up using four, I think, and it was supposed to look something like the compressor sets in a jet engine.”
“Why did we drop it?” Ryan was taking rapid notes.
“Mostly efficiency. You can only get so much water down the pipes no matter how powerful your motors are. And the drive system took up a lot of room. They partially beat that with a new kind of electric induction motor, I think, but even then you’d end up with a lot of extraneous machinery inside the hull. Subs don’t have that much room to spare, even this monster. The top speed limit was supposed to be about ten knots, and that just wasn’t good enough, even though it did virtually eliminate cavitation sounds.”
“Cavitation?”
“When you have a propeller turning in the water at high speed, you develop an area of low pressure behind the trailing edge of the blade. This can cause water to vaporize. That creates a bunch of little bubbles. They can’t last long under the water pressure, and when they collapse the water rushes forward to pound against the blades. That does three things. First, it makes noise, and us sub drivers hate noise. Second, it can cause vibration, something else we don’t like. The old passenger liners, for example, used to flutter several inches at the stern, all from cavitation and slippage. It takes a hell of a lot of force to vibrate a 50,000-ton ship; that kind of force breaks things. Third, it tears up the screws. The big wheels only used to last a few years. That’s why back in the old days the blades were bolted onto the hub instead of being cast in one piece. The vibration is mainly a surface ship problem, and the screw degradation was eventually conquered by improved metallurgical technology.
“Now, this tunnel drive system avoids the cavitation problem. You still have cavitation, but the noise from it is mainly lost in the tunnels. That makes good sense. The problem is that you can’t generate much speed without making the tunnels too wide to be practical. While one team was working on this, another was working on improved screw designs. Your typical sub screw today is pretty large, so it can turn more slowly for a given speed. The slower the turning speed, the less cavitation you get. The problem is also mitigated by depth. A few hundred feet down, the higher water pressure retards bubble formation.”
“Then why don’t the Soviets copy our screw designs?”
“Several reasons, probably. You design a screw for a specific hull and engine combination, so copying ours wouldn’t automatically work for them. A lot of this work is still empirical, too. There’s a lot of trial and error in this. It’s a lot harder, say, than designing an airfoil, because the blade cross-section changes radically from one point to another. I suppose another reason is that their metallurgical technology isn’t as good as ours — same reason that their jet and rocket engines are less efficient. These new designs place great value on high-strength alloys. It’s a narrow specialty, and I only know the generalities.”
“Okay, you say that this is a silent propulsion system, and it has a top speed limit of ten knots?” Ryan wanted to be clear on this.
“Ballpark figure. I’d have to do some computer modeling to tighten that up. We probably still have the data laying around at the Taylor Laboratory.” Tyler referred to the Sea Systems Command design facility on the north side of the Severn River. “Probably still classified, and I’d have to take it with a big grain of salt.”
“How come?”
“All this work was done twenty years ago
. They only got up to fifteen-foot models — pretty small for this sort of thing. Remember that they had already stumbled across one new principle, that back-pressure thing. There might have been more out there. I expect they tried some computer models, but even if they did, mathematical modeling techniques back then were dirt-simple. To duplicate this today I’d have to have the old data and programs from Taylor, check it all over, then draft a new program based on this configuration.” He tapped the photographs. “Once that was done, I’d need access to a big league mainframe computer to run it.”
“But you could do it?”
“Sure. I’d need exact dimensions on this baby, but I’ve done this before for the bunch over at Crystal City. The hard part’s getting the computer time. I need a big machine.”
“I can probably arrange access to ours.”
Tyler laughed. “Probably not good enough, Jack. This is specialized stuff. I’m talking about a Cray-2, one of the biggies. To do this you have to mathematically simulate the behavior of millions of little parcels of water, the water flow over — and through, in this case — the whole hull. Same sort of thing NASA has to do with the Space Shuttle. The actual work is easy enough — it’s the scale that’s tough. They’re simple calculations, but you have to make millions of them per second. That means a big Cray, and there’s only a few of them around. NASA has one in Houston, I think. The navy has a few in Norfolk for ASW work — you can forget about those. The air force has one in the Pentagon, I think, and all the rest are in California.”
“But you could do it?”
“Sure.”
“Okay, get to work on it, Skip, and I’ll see if we can get you the computer time. How long?”
“Depending on how good the stuff at Taylor is, maybe a week. Maybe less.”
“How much do you want for it?”
“Aw, come on, Jack!” Tyler waved him off.
“Skip, it’s Monday. You get us this data by Friday and there’s twenty thousand dollars in it. You’re worth it, and we want this data. Agreed?”
“Sold.” They shook hands. “Can I keep the pictures?”
“I can leave them if you have a secure place to keep them. Nobody gets to see them, Skip. Nobody.”
“There’s a nice safe in the superintendent’s office.”
“Fine, but he doesn’t see them.” The superintendent was a former submariner.
“He won’t like it,” Tyler said. “But okay.”
“Have him call Admiral Greer if he objects. This number.” Ryan handed him a card. “You can reach me here if you need me. If I’m not in, ask for the admiral.”
“Just how important is this?”
“Important enough. You’re the first guy who’s come up with a sensible explanation for these hatches. That’s why I came here. If you can model this for us, it’ll be damned useful. Skip, one more time: This is highly sensitive. If you let anybody see these, it’s my ass.”
“Aye aye, Jack. Well, you’ve laid a deadline on me, I better get down to it. See you.” After shaking hands, Tyler took out a lined pad and started listing the things he had to do. Ryan left the building with his driver. He remembered a Toys-R-Us right up Route 2 from Annapolis, and he wanted to get that doll for Sally.
CIA Headquarters
Ryan was back at the CIA by eight that evening. It was a quick trip past the security guards to Greer’s office.
“Well, did you get your Surfing Barbie?” Greer looked up.
“Skiing Barbie,” Ryan corrected. “Yes, sir. Come on, didn’t you ever play Santa?”
“They grew up too fast, Jack. Even my grandchildren are all past that stage.” He turned to get some coffee. Ryan wondered if he ever slept. “We have something more on Red October. The Russians seem to have a major ASW exercise running in the northeast Barents Sea. Half a dozen ASW search aircraft, a bunch of frigates, and an Alfa-class attack boat, all running around in circles.”
“Probably an acquisition exercise. Skip Tyler says those doors are for a new drive system.”
“Indeed.” Greer sat back. “Tell me about it.”
Ryan took out his notes and summarized his education in submarine technology. “Skip says he can generate a computer simulation of its effectiveness,” he concluded.
Greer’s eyebrows went up. “How soon?”
“End of week, maybe. I told him if he had it done by Friday we’d pay him for it. Twenty thousand sound reasonable?”
“Will it mean anything?”
“If he gets the background data he needs, it ought to, sir. Skip’s a very sharp cookie. I mean, they don’t give doctorates away at MIT, and he was in the top five of his Academy class.”
“Worth twenty thousand dollars of our money?” Greer was notoriously tight with a buck.
Ryan knew how to answer this. “Sir, if we followed normal procedure on this, we’d contract one of the Beltway Bandits—,” Ryan referred to the consulting firms that dotted the beltway around Washington, D.C., “—they’d charge us five or ten times as much, and we’d be lucky to have the data by Easter. This way we might just have it while the boat’s still at sea. If worse comes to worst, sir, I’ll foot the bill. I figured you’d want this data fast, and it’s right up his alley.”
“You’re right.” It wasn’t the first time Ryan had short-circuited normal procedure. The other times had worked out fairly well. Greer was a man who looked for results. “Okay, the Soviets have a new missile boat with a silent drive system. What does it all mean?”
“Nothing good. We depend on our ability to track their boomers with our attack boats. Hell, that’s why they agreed a few years back to our proposal about keeping them five hundred miles from each other’s coasts, and why they keep their missile subs in port most of the time. This could change the game a bit. By the way, October’s hull, I haven’t seen what it’s made of.”
“Steel. She’s too big for a titanium hull, at least for what it would cost. You know what they have to spend on their Alfas.”
“Too much for what they got. You spend that much money for a superstrong hull, then put a noisy power plant in it. Dumb.”
“Maybe. I wouldn’t mind having that speed, though. Anyway, if this silent drive system really works, they might be able to creep up onto the continental shelf.”
“Depressed-trajectory shot,” Ryan said. This was one of the nastier nuclear war scenarios in which a sea-based missile was fired within a few hundred miles of its target. Washington is a bare hundred air miles from the Atlantic Ocean. Though a missile on a low, fast flight path loses much of its accuracy, a few of them can be launched to explode over Washington in less than a few minutes’ time, too little for a president to react. If the Soviets were able to kill the president that quickly, the resulting disruption of the chain of command would give them ample time to take out the land-based missiles — there would be no one with authority to fire. This scenario is a grandstrategic version of a simple mugging, Ryan thought. A mugger doesn’t attack his victim’s arms — he goes for the head. “You think October was built with that in mind?”
“I’m sure the thought occurred to them,” Greer observed. “It would have occurred to us. Well, we have Bremerton up there to keep an eye on her, and if this data turns out to be useful we’ll see if we can come up with an answer. How are you feeling?”
“I’ve been on the go since five-thirty London time. Long day, sir.”
“I expect so. Okay, we’ll go over the Afghanistan business tomorrow morning. Get some sleep, son.”
“Aye, aye, sir.” Ryan got his coat. “Good night.”
It was a fifteen-minute drive to the Marriott. Ryan made the mistake of turning the TV on to the beginning of Monday Night Football. Cincinnati was playing San Francisco, the two best quarterbacks in the league pitted against one another. Football was something he missed living in England, and he managed to stay awake nearly three hours before fading out with the television on.
SOSUS Control
Except for the fact th
at everyone was in uniform, a visitor might easily have mistaken the room for a NASA control center. There were six wide rows of consoles, each with its own TV screen and typewriter keyboard supplemented by lighted plastic buttons, dials, headphone jacks, and analog and digital controls. Senior Chief Oceanographic Technician Deke Franklin was seated at console fifteen.
The room was SOSUS (sonar surveillance system) Atlantic Control. It was in a fairly nondescript building, uninspired government layer cake, with windowless concrete walls, a large air-conditioning system on a flat roof, and an acronym-coded blue sign on a well-tended but now yellowed lawn. There were armed marines inconspicuously on guard inside the three entrances. In the basement were a pair of Cray-2 supercomputers tended by twenty acolytes, and behind the building was a trio of satellite ground stations, all up-and down-links. The men at the consoles and the computers were linked electronically by satellite and landline to the SOSUS system.
