After he had moved fifty yards from shore, Pitt surfaced and looked south. The patrol boats had reached the end of their circuit and were turning to come back. "Our escort is heading our way," he spoke through the communicator. "I hope you're right about them doing four knots. That's about as fast as our propulsion vehicles can pull us."

Giordino's head slipped from the black water beside him. "It will be close, but I think we can hang with them. Let's hope they have no infrared underwater cameras."

"The fjord is at least half a mile wide- too large an area to be effectively covered by cameras." Pitt swung around and gazed at the lights to the north. "With three shifts working twenty-four hours, the Wolfs must be paying a king's treasury in wages."

"What do you bet they don't tolerate employee unions?"

"What do you figure the patrol boat's draft at?"

"Less than two feet, but it's the prop we worry about. It's probably almost three feet in diameter."

They watched closely as the patrol boat on their side of the fjord approached. Estimating its course, they swam out another ten yards and then curled over and swam down to twelve feet, before the searchlight could catch their heads protruding above the surface. Underwater, the boat's engine and thrashing propeller sounded four times louder than they did in the air. They rolled onto their backs and waited. They stared at the fjord's surface from below, watching the searchlight beams come closer at they danced over the icy water.

And then the boat's shadowed hull swept overhead, propelled by the big screw that churned past in a cyclone of froth and frenzied bubbles. Almost instantly, Pitt and Giordino pressed the magnetic speed switches against their stops, gripped the handles, and merged into the seething wake of the patrol boat.

At four knots, the prop wash was not as extreme as it would have been if the boat had been speeding along at its maximum of eighteen. They easily maintained a stabilized course behind the patrol boat without being pitched and buffeted. Their most pressing dilemma was that it was almost impossible to see where they were going. Fortunately, a bright stern light was visible to Pitt through the agitated water, so he kept his eyes locked on it, his hands gripped around the handles of the propulsion vehicle as he manhandled its torpedo-rounded bow so that it maintained a steady course through the turbulent water.

They trailed the boat for the next two miles, six feet below the cold surface water of the fjord, barely keeping pace, pushing their propulsion vehicles to their limits. They were draining the batteries at a rapid rate. Pitt could only hope they would have enough juice for the return trip to the ravine and the Skycar. His only consolation was that he and Giordino would not be easily visible so close to the surface under the brilliant lights from the shipyard. Though they were shielded by the wake and with their black dry suits blending into the freezing depths, a sharp-eyed crewman just might catch a glint of something suspicious. But no assault came. Pitt had correctly assumed that the crew had their eyes focused on the sweep of the searchlights forward.

"Can you hear me okay?" asked Pitt through the communicator inside his full face mask.

"Every syllable," replied Giordino.

"My monitor shows we've covered almost two miles. The boat should be ready to begin a turn for its next pass down the fjord. The second we feel the wake cut either left or right, we head down to a safe depth for a few minutes before surfacing to get sight bearings."

"I'll tag along," said Giordino, as calmly as if he were waiting for a bus to come around the corner.

In less than three minutes, the patrol boat began a wide 180-degree turn. Sensing the wake begin to curve, Pitt and Giordino dove to twenty feet and hung in the water until the searchlight faded into the distance and could no longer be seen from underwater. Slowly, cautiously, they kicked their fins and ascended, not knowing exactly where they would surface in the shipyard.

Both heads inched above the water surface, both pair of eyes scanning the surrounding water. They found themselves drifting only seventy-five yards from the first of four enormous docks that extended over a mile into the fjord. A colossal floating city was moored along the nearest dock, while the three other immense ships were tied beside parallel docks. They presented a dazzling sight as they glittered under the night sky. To Pitt and Giordino, staring up at the colossus from the water, its size was inconceivable. They could not conceive that such an unbelievable mass not only floated but could cruise the world's seas under its own power.

"Can it be real?" Giordino murmured in awe.

"Stupendous comes to mind," Pitt said, barely above a whisper.

"Where does one begin?"

"Forget the ships for now. We've got to find a place to get out of our dive gear before we hunt down the shipyard offices."

"You think Pat is kept there?"

"I don't know, but that's as good a place as any to start."

"We can move beneath the dock until we reach the rocks along the shore," said Giordino, holding up a hand to gesture at the water between the great dock pilings. "There are some darkened sheds off to the right. Hopefully, we can gain entry and change into our work clothes."

The work clothes were orange coveralls, similar to American prison uniforms, that had been custom-made from blown-up, enhanced photos of the workers. The pictures had been recorded by a spy satellite and given to Admiral Sandecker, along with detailed maps of the shipyard and a photo-analysis identification of the many buildings.

Punching a program into his direction finder, Pitt then held the monitor against his face mask and saw the pilings of the dock materialize before his eyes as if he were standing on dry land under a bright sun. He felt as if he were swimming through an underwater corridor with shimmering lights filtering down from above.

They moved over large pipes and electrical conduits that led from the shore to the end of the dock. Visibility had increased to over a hundred feet beneath the reflection of thousands of lights so bright it was as if they were along the Las Vegas strip.

Pitt swam, with Giordino at his side and slightly behind, over a bottom layered with smooth rocks. Gradually, the rock-strewn bottom began to rise until the divers were pulling themselves along by hand. Stopping and lying in the shallows, they saw steps leading up from a small concrete quay not far from the dock pilings. A single light globe cast its paltry glow over the quay, in contrast to the galaxy of lights illuminating from the shipyard, lighting up the front of small buildings that Pitt had memorized from the satellite photo as tool sheds. Only the side walls away from the bright lights were lost in the shadows.

"How does it look?" asked Giordino.

"Deserted," Pitt answered. "But there is no way of telling if anyone is lurking out there in the dark." He had no sooner spoken than Giordino, who was peering through his spectral image scope, spotted movement along the side of the nearest tool shed. He gripped Pitt's shoulder as a warning, as a uniformed guard with an automatic weapon slung over one shoulder emerged into the light and briefly glanced down at the quay. They lay unmoving and half submerged, partially hidden by the dock pilings.

As Pitt half expected, the guard looked bored, since he had never seen any suspicious person attempting to sneak into the shipyard. No burglar, thief, or vandal would have bothered to rob a facility over a hundred miles from the nearest town, and especially not one that was on the other side of several glaciers and the Andes Mountains. He soon turned and walked back into the gloom along the row of tool sheds.