Kathy announced a Harrier was deploying a towed noisemaker sled, well ahead of the ship, to sweep for mines and to decoy Axis torpedoes. Jeffrey hadn't heard of this tactic before.
Another airplane crashed, somewhere to starboard. Another, somewhere to port. Above the sound of Challenger's flow noise, another ISLMM went off at the mouth of the Great Belt. Kathy announced a huge twin secondary blast, same bearing and range: assessed as a German destroyer, its main magazines blowing up. But there'd be more such ships pursuing Challenger, far more than there were mine warheads in Jeffrey's improvised barrier.
TWO HOURS LATER
In the CACC rigged for black, Jeffrey wore burn ointment on his face, but under it his cheeks blistered. His left leg ached, and his whole chest was sore, in spite of the mild painkiller and anti-inflammatory the first aid people had supplied. Jeffrey hardly noticed his physical discomfort; a new surge of adrenaline coursed through his blood. The next choke point was coming, the constriction that marked where the Kattegat ended and the Skagerrak began. To port of Challenger lay Skagen, at the northeast tip of Denmark, surrounded by treacherous shoals. To starboard, still, loomed Sweden. At least her neutrality prevented the Germans from going nuclear here. The water near Challenger was two hundred fifty feet deep. Kathy reported the last remaining Harrier pilot was jettisoning his noisemaker sled. He went for altitude. He veered east. Jeffrey knew that, rather than return to the U.K. when he reached bingo fuel, the pilot had stayed as antimine escort as long as he possibly could. Now, flying on the vapor in his tanks, he sought internment in Sweden, and Jeffrey silently wished him Godspeed. Dogfights raged again in the distance, but neither side had local air superiority now.
Jeffrey ordered Meltzer to slow to ahead one third. He ordered COB to deploy the LMRS. As Challenger slowed through thirty-two knots, her pump-jet vibrated — a mechanical transient datum that couldn't he helped. Kathy announced several German warships rounding the head-land at Skagen, charging toward Challenger from further out in the Skagerrak. Jeffrey ordered Bell to launch a brilliant decoy, set to run northeast at fifty knots, then parallel to the Swedish coast, to imitate Challenger trying to outflank the Germans.
The frigates and corvettes took off northeast, also at flank speed, which for them was thirty or thirty-three knots. The way past the choke point was clear. The LMRS showed no new mines on the track Jeffrey planned to take.
It was too easy. Those warships should've split up, with some prosecuting the fifty-knot contact and the rest of them guarding the gap.
Jeffrey realized he was being suckered. The Norwegian
Deep was no place of refuge. He remembered the newsreel, Deutschland triumphant, the underground U- boat pen. It was hours now since the blast at Greifswald. Eberhard. It had to be. Kurt Eberhard was waiting for him in the Norwegian Deep. Ilse held hard to her armrests as Challenger's bow nosed into a steep down-bubble. She tilted sideways uncomfortably in the rig for black.
'Helm,' she heard Jeffrey's voice say in the dark, 'make your depth twenty-three hundred feet. Chief of the Watch, engage nap-of-seafloor cruise mode. Maintain bottom clearance one hundred feet.'
Ilse slaved one of her console screens to COB's forward-looking gravimeter view. She watched as the ship dove into the Norwegian Trough. The bottom dropped off rapidly. Ilse saw huge boulders go by, embedded in the muck. She knew they'd been transported here on glacial icebergs; when the icebergs melted, the boulders sank. Ilse helped Kathy update their sound propagation models, as real-time data poured in on temperature and salinity outside the hull. Challenger's course was three one five, northwest, to the deepest part of the Norwegian Deep. But this was also taking the ship right at the coast of occupied Norway; freshwater river runoff, and the steep terrain rise at the far wall of the Trough along the shoreline, would affect target detection and counterdetection in tricky ways.
'Captain,' Lieutenant Sessions said from the nav console. 'Next course leg, recommend turn left on two three zero in three nautical miles.'
Nay.'
Ilse glanced at her speed log window: still making fifteen knots. She called up the navigation chart. She overlaid the data COB had gathered through the LMRS on the way into the Skagerrak, two days ago that seemed like two years. The ship was following an Axis submarine safecorridor — a two-day-old corridor; soon their data on the corridor would peter out. The LMRS worked in front of the ship again, ten thousand yards off, scouting for mines and enemy hydrophones, helping Challenger feel her way. Jeffrey said they were comparatively safe for now — the real threat would be Deutschland later. If this crapshoot through an Axis mine field was 'safe,' Ilse didn't want to think about later.
'My depth is twenty-three hundred feet, sir,' Meltzer announced.
''Well the Helm.' Challenger leveled off.
Ilse heard a pop and roar on her headphones.
'Surface impact datum,' Kathy called. She gave the bearing and range — it wasn't close. ' Assess as a fighter shot down…. No ejection seat hitting the water.'
'Very well, Sonar…. Fire Control, your assessment?' Bell cleared his throat. 'Neither side has control of the air, sir. It matters less and less to us as we go deeper.'
'Concur,' Jeffrey said. 'If you were Deutschland, where would you wait?'
'Where their ROEs let them go nuclear, Captain. Two hundred miles from Sweden. That's just before Stavanger, up the Norwegian coast, where the smooth shoreline first breaks up into hundreds of miles of islands and fjords.'
'I concur, sir,' Kathy said. 'If I were Captain Eberhard, I'd wait near Stavanger. The seafloor there rises slowly to seven hundred feet and the coast to our right is a sheer cliff dropping into the Trough. Good conditions to capture our flow noise and tonals, while they lurk and listen.'
'Then what do you think, XO? We go shallow? Sneak out of the Trough and try to outflank through the North Sea?'
'We can't afford more exposure in water a hundred feet deep, Captain. We'll be too exposed to enemy surface and airborne sea-denial forces, and we'd have to move very slowly. As the magnetic storm wears off, running shallow becomes too dangerous.'
'Concur,' Jeffrey said. 'We need to stay as deep as possible, which is just what the Axis wants. We'll run into Deutschland head-on. With us on the move, she'll have the advantage of greater stealth. If we just sit in one place and try to hide, we put off the inevitable, and make everything worse…. Sonar, can you compensate for the collision damage to our port wide-aperture array?' That burning frigate, back at the south end of the Sound, had scraped and dented the hull-mounted hydrophones.
'Negative, sir. Substantial degradation in both gain and directivity.'
'Then we need to stay on the left side of the Trough. Use it to shield our weaker side, and do our correlogram and instant-range-gate searches with the starboard array.'
'Concur, sir.' Kathy's throat sounded tight.
'There's no point in dawdling, people. We just give Eberhard more time to lay deployable hydrophone lines and perfect his sonar ray traces. Helm, make top quiet speed, twenty-six knots.' Meltzer acknowledged.
Kathy turned to Ilse. 'There's something you should know,' Kathy said in an undertone.
'My fiance. I said his destroyer was vaporized.'
'I remember…. You think it could happen to us?' 'Not that…. I didn't tell you… it was Deutschland that nuked his ship. Eberhard did it to him.' Ilse ran more calculations — as Challenger worked her way north. The ship nosed up, and Ilse eyed the gravimeter screen. Challenger followed the bottom as the seafloor rose off Kristiansand, Norway. Ilse switched to the large-scale navigation chart. The water depth would decrease gradually, then plateau for a while at fifteen hundred feet. They were one hundred miles from Sweden now; a while to go till Stavanger and the moment of truth with Deutschland. Jeffrey and Bell conferred, plotting strategy. Their tone, Ilse noticed, was much more collegial than during Challenger's frustrating hunt for the 212 and 214 U-boats, before reaching Texas.
Ilse went back to listening on her headphones. A gale had blown in on the surface. Above the noise of wind
