Dangerous Ground jm-1

by Larry Bond

  Now centered in the trench, Jerry turned the Manta in a complete circle before heading north, trying to create a “knuckle” in the water. A mass of disturbed water, a knuckle could reflect active sonar pulses. Normally subs made gentle turns so they wouldn’t create a knuckle, but not this time. He’d hang lights on it if he could.

  Jerry also reduced the Manta’s speed to five knots, both to save the battery and because that’s what a real sub would do.

  “Conn, U-bay. How many of those depth charges does a plane carry?”

  The control room talker said, “U-bay, conn. Wait one.” A minute later he relayed, “If depends on the sonobuoy and torpedo loadout. A Bear Foxtrot can carry up to twelve. A May can carry ten.”

  “Conn, U-bay aye. Thanks.” And that’s per airplane. Wonderful.

  Hardy came on again. “Mr. Mitchell, I’m turning Memphis to zero three zero now.”

  “Yessir. How long will it take before we know if this is working or not?” Jerry hated to ask, but the question nagged at him.

  “As long as they don’t attack Memphis, it’s working, mister. Just keep doing what you’re doing. I’m sure you can make it work.”

  Jerry was so surprised he didn’t answer. Hardy, encouraging him? Now he was really worried.

  “Conn, sonar. More explosions to the west. They might be more ranging charges.” As sonar made its report, the Manta’s sonar display also showed the sound spike. It showed a detonation ahead and to starboard of the Manta. He fed the bearing from the Manta’s detection to control, where they plotted both lines on the chart.

  The talker sounded almost happy. “U-Bay, conn. Plot confirms the explosions are in the trench, and the strength is right for an echo-ranging charge.”

  Jerry felt relieved for Memphis, but paternal concern for the UUV. Anything that could hurt Memphis would kill the Manta very quickly, which would end its job as a decoy. It would also deprive the American taxpayers of several millions of dollars’ worth of high-tech prototype. And the wreckage would be in shallow water, easily recoverable.

  Time to wiggle, he decided. Jerry turned the Manta toward the last explosion and changed his depth, bringing the Manta up. That should make it easier to distinguish from the seabed.

  Another ranging charge showed up on the Manta’s display and sonar also reported the blast. This one was behind and to starboard, but Jerry turned the Manta to port, as if he was trying to get away from the spot. He also told the Manta to go deeper, but not all the way to the bottom.

  A third charge followed in quick succession, this time ahead of the Manta, and Jerry increased speed to eight knots. The idea was to convince them they had a live target, but not to actually become one. And the longer it took, the better.

  “U-bay, conn. The tracking party thinks the patrol boats are headed west, toward the trench and the Manta. The Captain’s increasing speed to six knots, but says you’re supposed to keep them busy as long as you can.”

  “U-bay, conn aye.” A fourth charge exploded to the aft of the Manta, but close aboard, to judge by the signal strength on the display. He was trying to figure out which way to zig when the passive sonar picked up a new sound.

  “Conn, sonar, I’ve got a torpedo in the water to our west!” Jerry had never seen a torpedo on the Manta’s passive display, but instantly agreed with the sonar operator’s call. It was a perfect drop from the Russians’ point of view, ahead and to port. As the torpedo turned to starboard to begin its search pattern, the Manta would be dead ahead.

  Jerry told the Manta to release an ADC Mk 3 torpedo countermeasure, then kicked the UUV hard to port. He was already at eight knots, not enough to get out of the area quick enough, so he ordered the Manta to maximum, twenty knots, quickly computing how long he could head west across the trench at that speed.

  His one advantage was the maneuverability of the Manta. It was as maneuverable as a torpedo, and if he could get behind the torpedo and stay there, the weapon would never pick him up. Of course, as soon as this one ran out of fuel, they’d drop another, but first he had to live through this one.

  He watched the torpedo’s bearing on the Manta’s display, trying to guess its course and how far it was from the vehicle. As quickly as he could, Jerry slowed the UUV and turned it toward the torpedo, attempting to stay behind its seeker cone.

  Along with the noise of the torpedo’s engine, he could also detect the active seeker, pinging at high frequency. The rate of the pinging was important, because as long as the pings were widely spaced, the weapon was in search mode. If the ping rate increased, that meant the torpedo had found something and was taking a harder look.

  As Jerry maneuvered, he kept up a running commentary to control, telling them what the Manta was seeing and what he was planning. For the most part, control didn’t answer, aside from an occasional “U-bay, conn aye.”

  For almost a minute, the bearing continued moving to the right and Jerry chased it, taking the Manta in almost a full circle. He tried to visualize the position of the two as they circled a common point. While he could see where the torpedo was, in relation to the Manta, he could only guess at where the torpedo was headed, which would help tell him where the seeker cone was — and whether or not he was in it.

  Finally he seemed to catch up, the bearing to the torpedo changing less and less until he almost went past it and had to quickly correct, all the while dealing with the growing time lag as the Manta increased her distance from Memphis.

  The torpedo bearing remained steady for a few moments, and Jerry saw that it was headed south, probably toward the countermeasure he’d dropped. Turning as tightly as he could, he commanded the Manta north again. Hopefully he could get some separation before it sorted out the decoy and went into a circular reattack search pattern.

  North, always north. That’s what a real sub would do: try to reach the northern exit of the Kara Sea and get out of this geographic bear trap. He wanted the Russians to think that as well. And as long as he kept going north, he’d be running parallel with Memphis and wouldn’t have to worry about getting beyond control range. Still, the time lag was already a major factor.

  The torpedo remained to the south, and Jerry heard it switch to a higher ping rate. The countermeasure had worked, then. Jerry adjusted the Manta’s depth, putting about one hundred and fifty feet between the UUV and the seabed. If they started echo-ranging again, he wanted to stand out from the bottom. He kept his speed low, at five knots.

  It took five minutes for the weapon to run out of fuel. They couldn’t drop another weapon until the first torpedo stopped, and he used the time to get some distance behind the Manta. It was also another five minutes’ grace for Memphis as she headed northeast.

  Jerry had expected them to start echo-ranging again, but the next sound he heard was another torpedo starting up — and close aboard, to judge from the signal strength. He quickly turned the Manta toward the weapon, hoping to get past it and behind it, as well as triggering another torpedo countermeasure.

  They must have just taken the last drop point and figured how far he’d get at five knots. They’d come closer than he liked, and Jerry decided it was time to get out of Dodge. He said as much over the circuit and Hardy’s voice immediately said, “Agreed, as quickly as you can.”

  Jerry instructed the Manta to terminate the simulator mode, cut the speed to creep, and dropped to the bottom. He’d grown to trust the Manta’s safety circuits and used them now as he sent the craft within ten feet of the bottom, far closer than Memphis could ever go. The torpedo’s seeker could distinguish the hull of a submarine from the seabed, but the Manta was much smaller, a hundredth the size of a nuclear attack boat. With any luck, the torpedo’s seeker would dismiss it as an echo from the seabed.

  And Jerry headed south. He kept a careful eye on the nav display, because now Memphis and the UUV were heading away from each other.

  He also watched the sonar display as the torpedo’s bearing remained firmly north, behind him. Whether the seeker had ne
ver spotted him or had been attracted by the countermeasure, it was still in search mode and seemed to have no idea where he was.

  “Sonar, U-bay. I need to know if you see any sign of the Russians searching to the south of that last attack.”

  “U-bay, sonar. We don’t hold any active sonars in your area, but the Manta’s passive arrays will know about it as soon as we do.”

  Jerry had to agree with them. He needed more information. He’d love to know where the airplane or airplanes hunting them were, but Memphis didn’t dare put up a mast.

  Jerry visualized the search radius of the torpedo and turned distance into time at five knots. The next two minutes seemed eternal and Jerry forced himself not to look at his watch. He stared at the sonar display instead and willed it to remain blank.

  There was no sign of attack, pursuit, or even interest in the Manta’s location, and Jerry gratefully turned the UUV east, carefully managing its depth as it rose up the steep eastern wall of the trench. He almost felt like a soldier leaving a foxhole as he brought the Manta out of the trench onto the shallow seabed.

  Memphis lay over six miles away, mostly to the east, and Jerry headed straight east at first, reluctant to do anything that would bring him closer to their Russian pursuers. The problem now was to rendezvous with Memphis. With the Manta and the sub both creeping, Jerry knew he’d never catch her. “Conn, U-bay, I need to speak to the Captain.”

  “Yes, Mr. Mitchell,” Hardy said after a brief pause.

  “Sir, I’d like permission to go to ten knots. At Memphis’ current speed, I’ll close in an hour and a half.”

  “What’s your battery charge?”

  “Twenty percent. I’m good for two hours at that speed.”

  “And at that speed, if you pass through a buoy field, they’ll pick you up for sure,” Hardy observed.

  “Sir, I can’t catch you at five knots.”

  There was a short pause. “I’m turning Memphis due north and slowing to three knots. Turn to zero four five and increase speed to seven knots. We should rendezvous in two hours.”

  Jerry made the course and speed changes. “Yes, sir, and thank you.” Jerry felt genuinely grateful. It would be easy for Hardy to abandon the Manta, claiming that the risk of pursuit was too great, but his solution would keep the two units covert and still get the UUV back.

  Jerry watched as the Russians remained preoccupied to the southwest. Bull Horn sonars pounded the water over the trench and by the Novaya Zemlya coastline. An occasional series of explosive charges to both the northwest and southwest confirmed Jerry’s hopes that they had indeed lost contact with the Manta, and more importantly Memphis.

  Two hours later the Manta rendezvoused with Memphis. Although there had never been a problem with the automated recovery sequence, Jerry sweated every step until the latches were engaged and the umbilical connected. Drained, he slipped out of his seat and headed slowly to the wardroom for something to drink. The XO said he’d meet him there to go over the tactics Jerry had used to break contact. “Better to get them down on paper while they’re still fresh in you head,” Bair said gleefully.

  Fresh? Yeah, right. Jerry thought cynically. Let’s see, how can one expand “pop chaff and evade” to fill a couple of pages of the patrol report? Still, the Manta had successfully been used to bamboozle a very determined Russian ASW force and the U.S. Navy would demand to know how it was done — in detail. As he climbed the ladder up to forward compartment, middle level, Jerry fervently hoped that there would be no further need to launch the Manta again on this cruise.

  * * *

  “Keep at it, Ivan,” Kirichenko encouraged his deputy. It had been three hours since there had been any trace of the American sub, or possibly submarines, he corrected himself. “They’re still there. They didn’t just vanish.”

  “Yes, sir.” Admiral Ivan Sergetev tried to look determined, but couldn’t hide his disappointment. They had been so close to getting one of those arrogant trespassers that losing contact was a bitter pill to their morale. And the longer the Americans stayed lost, the greater the chance the Northern Fleet would never find them again.

  “Concentrate on the second line now, but don’t stop using the first.” Kirichenko didn’t dwell on the details. Sergetev was a good tactician. He knew what to do.

  “Yes, sir. I’ll find them.” On his second try, Sergetev sounded a little more confident.

  Kirichenko left the situation room and headed for his office. He trusted his deputy, but not enough to bet his life on him. Keeping calm and appearing positive in front of his staff had taken every gram of his concentration. He’d need his staff’s support to back him up — later.

  The only good news so far was the absolute certainty that there was a submarine to be prosecuted. It had been repeatedly echo-ranged. Aircraft had seen its wake as it fled the scene of the attack. The Americans had deployed numerous countermeasures and the sounds from those devices had been recorded. Unfortunately, the submarine had been attacked several times without result.

  There was no guarantee that the second line would catch the Americans. It was scattered, still forming. Like the first one, it was made up of units that had been out training or had been in a high state of readiness. There were precious few of those in the Northern Fleet.

  The second line consisted of every unit that could reach the Kara Sea before the intruder reached international waters. Diplomatically, the Russians could make a case for attacking a submarine in the Kara Sea, even if it was outside the twelve-mile limit, by invoking hot pursuit. That would be harder, much harder, in the Barents or Norwegian seas.

  So he’d have to have a reason to risk international condemnation. A strong one, one that represented a clear and present danger to the motherland. Easy to do if you’re not constrained by the truth. He started drafting a message.

  His staff knew that the Americans had been operating close to the coast. What they didn’t know was that he’d received top secret, compartmented information from the Northern Fleet’s counterintelligence officer. A foreign agent with stolen codes had evaded the FSB and was trying to leave the country. His last known location was in the Arkhangel’sk Oblast. If he had somehow managed to get to Novaya Zemlya and was aboard that submarine, and that sub made it safely back to port, Russian military communications would be compromised. Even after the codes were changed, Western intelligence would still be able to read a decade’s worth of encrypted messages. The damage to Russian security would be grave. Extreme measures had to be taken to prevent this from happening.

  22. CLOSE QUARTERS

  June 12, 2005

  Northern Kara Sea

  Lunch that afternoon was a celebration, although an ultra-quiet one. Jerry thought the cold sandwiches and canned fruit were a banquet and the thought of going home filled him with possibilities. True, he had a ton of work to do if he wanted to qualify for his dolphins, but compared to their earlier problems, his quals didn’t seem so insurmountable now. He’d make the time.

  Especially at twelve knots. Lieutenant Commander Ho had already briefed the Captain, but the entire wardroom needed to know exactly what Memphis’ engineering plant could and could not do.

  The Engineer looked tired, and a little shaken. He’d already briefed them on the four men who’d been injured, none dangerously so, but it was clear he’d felt their injuries almost as much as they had. His tone had improved and become steadier when he’d described the casualties to the plant.

  The worst was the port main engine. The shock of the depth charging cracked the main throttle valve casing and caused a major steam leak, scalding three men nearby. Another man broke his ankle trying to get away from the jet of steam. The space had immediately filled with vapor, making it hard to see and to breathe. They’d drilled for it, though, and after donning EABs, had secured the steam supply to the main engine.

  But now, to run at the same speed, the remaining engine would have to work twice as hard, which would make much more noise.

 
; And the throttle valve couldn’t be repaired at sea. Because it had to hold saturated steam at six hundred psi and 485° Fahrenheit, it was made of thick stainless steel. The ship didn’t have the capability to weld metal that thick, with a crack that large. They couldn’t even patch it while at sea. The only thing they could do was secure the port main engine until they reached a base with the necessary equipment and personnel to effect the repairs.

  Their creep speed was reduced from five to three knots. That wasn’t too bad, since nobody ever tried to get anywhere at creep. The point was to be as quiet as physically possible. Their transit speed was now twelve instead of twenty knots and their top speed, at which they’d make more noise than a boiler factory, was twenty knots. “Over twelve knots, I’d have to shift the starboard main seawater pumps to fast speed, and you can’t be quiet with those on the line.

  “The oxygen generator fried itself when some of the breakers were rattled around. Fortunately, the oxygen banks are full and we won’t need to make any more before we reach a friendly port. And there are pumps and fittings knocked loose throughout the engine room and the auxiliary machinery space,” Ho concluded. “The only good news is that if we don’t take any further hits, we’ll probably make it back without any more equipment casualties.”

  “That was a ringing endorsement,” Lenny Berg remarked cynically. “Would it help if I got out and pushed?”

  “I like the ‘getting out’ part,” the XO answered, with only a slight smile.

  “I was only trying to help,” Berg complained.

  “Jerry, any luck with the torpedo tubes?” Bair asked.

  “None, sir. With the preset panel gone, there’s no way to talk to a weapon. The Senior Chief’s been trying to jury-rig something, but he’s not hopeful.”

  Dr. Patterson, sitting to one side with Emily Davis, spoke up tentatively. “But you can still fire a torpedo, can’t you? Emily says there’s nothing wrong with the tubes themselves.”