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The Virage TX was painted a charcoal gray that blended into the black water. Contrary to what is shown in the movies where agents sneak around in black skintight suits, dark gray has less visibility under the stars at night. The three-cylinder engine was massaged by NUMA engineers to put out one hundred and seventy horsepower. Noise reduction was also modified to reduce exhaust noise by ninety percent.
Speeding across the black water, the only sounds came from the slap of the bow and the muted hum of the tuned pipe exhaust. They had reached the outer edge of the Isle de Ometepe in half an hour after leaving a deserted wharf south of Granada.
Pitt eased back on the throttle as Giordino studied a basic, handheld radar detector. "How's it look?" Pitt asked.
"Their beam sweeps past us without pausing, so they must not be reading us."
"We were wise to take the precaution of finishing the trip underwater," Pitt said, tipping his head toward a pair of searchlights that were sweeping the water for five hundred yards off the shore.
"I make it about a quarter of a mile."
"Our depth sounder reads the bottom at only twenty-two feet. We must be out of the main channel."
"Time to abandon ship and get wet," Giordino said, motioning toward a patrol boat that appeared around the end of a long dock.
Already in their light wet suits, they quickly pulled their dive gear and packs from the jet ski's storage areas. The Virage was a stable craft and they could stand while helping each other slip into their oxygen closed-circuit rebreathers, of a type used by the military for shallow-water operations. After quickly going through the predive checking procedures, Giordino slid into the water while Pitt tied the hand grips in a straight position. Then he aimed the jet ski on a course toward the west shore of the lake and set the throttle as he slid off. Neither man took a backward glance at the speeding craft before diving beneath the surface. Though they were using communication equipment, they took no chances of losing each other in the ink-black water. They clipped the ends of a ten-foot line to their weight belts.
Pitt preferred the oxygen closed-circuit rebreather. The semi--closed circuit rebreathers were more efficient for deepwater work, but they left telltale signs of bubbles on the surface. Breathing one hundred percent oxygen, the rebreather was the only true bubble-free diving system, the reason they were used by military divers on covert missions. There could be no detection on the surface because the system eliminated all indications of bubble exhaust. It took specialized training to use the system efficiently without problems, but Pitt and Giordino were no strangers to rebreathers, having used them for twenty years.
Neither man spoke. Giordino trailed behind, tracing Pitt's movement by using a shaded underwater penlight that sent out a thin beam that was next to impossible to spot from the surface. Pitt saw the bottom slope down as they came to the main ship channel. He leveled off, checked his compass and began kicking toward the Odyssey dock. Far into the distance, magnified by the water, he and Giordino could hear the thrash of the patrol boat's twin screws.
Relying on his compass and computer displaying GPS positions, they homed in on the section under the main dock where it met the shoreline. They swam slowly and steadily, seeing the water on the surface become a shade less black as they came closer to the lights beaming over the entire dock area. They could also see the sweep of the searchlights as their yellow shafts streaked across the surface above them.
The water became more transparent, and they began to see the yellow glow turn brighter on the water surface. Another hundred yards and they could make out the faintly shimmering outline of the dock pilings. They skirted around the big COSCO containership, staying far enough away so no idle crewman could see them under the surface. All activity had come to a standstill on the dock. The big cranes became immobile and the warehouses were closed and deserted as the trucks moved away.
Suddenly, Pitt felt the back of his neck tingle and he sensed a movement in the water as a huge shape materialized out of the gloom and swiped Pitt's shoulder with its tail and disappeared. He stiffened and Giordino immediately sensed the rope go slack.
"What is it?" Giordino demanded.
"I think we're being stalked by a
carcharhinid."
"A shark?"
"A Lake Nicaragua bull shark, with blunt-nosed snout, big and gray, eight to nine feet."
"Do freshwater sharks bite?"
"Show me one who isn't carnivorous."
Pitt swept the narrow beam of the penlight in a circle, but it failed to pierce the murky water for more than ten feet. "We'd better circle the wagons."
Giordino swiftly picked up on the meaning and swam to Pitt's side and turned until they were back to back, facing in opposite directions to cover three hundred and sixty degrees. As if reading the other's thoughts, they pulled their dive knives from the sheaths attached to their lower legs and held them as if pointing swords.
Their nemesis returned and slowly spiraled around them, moving closer with each circle. Its gray skin was ominously illuminated under the tiny glow of their penlights, a big repulsive beast staring at them from one black eye as large as the rim on a coffee cup, with a wide jaw showing triangular rows of serrated teeth like a snarling dog. It turned sharply and eased past the divers for a closer look, never having seen such strange fish with appendages that did not resemble its usual victims. It had the look of a gluttonous monster trying to make up its mind whether the two weird fish that had intruded into its domain would make a palatable meal. It seemed curious that its prey made no move to dart away.
Pitt knew the sinister murder machine was not quite ready to attack. The mouth was only slightly open and the lips had not pulled away from the hideous teeth. He decided that offense was the best defense and he lunged at the creature, thrusting his knife and making a slashing swipe across the shark's nose, the only tender spot on its taut body.
The shark rolled away, trailing a streak of blood, confused and angered by the sudden show of resistance from what should have been an easy kill. Then it turned, hovered for a few moments, flipped its tail fins and came at them with phenomenal speed in a movement dead silent, straight for the kill.
Pitt had only one trick left in his bag. He shined the beam of the penlight directly into the shark's right eye. The unexpected flash temporarily blinded the killer just enough to induce it to veer and roll to his right, mouth opening in anticipation of biting into flesh and bone. Pitt kicked fiercely, twisting his body to one side as the shark flashed past, using its pectoral fin to push it away. The yawning jaws clamped shut on empty water. Then Pitt lashed out with the knife and gashed the monster in its black lifeless eye.
Two things could have happened. The maddened shark could have attacked without further hesitation, provoked by pain and anger, or it could have swum away, half blinded, giving up the battle for easier prey.
Fortunately, it swam away and did not return.
"That was about as close as we ever came to being a special on a dinner menu," Giordino said, in a vague tone still tinged with tension.
