Linda activated the ballast pumps, slowly drawing water into the tanks, and gently eased the sub out through the bottom of the Oregon ’s hull. Though she had done it dozens of times, her motions were careful and deliberate. She watched the depth gauge and the laser range finder mounted on the top of the submersible, to ensure they had cleared the keel.

“Nomad is free,” she said, when they were twenty feet below the hull.

“Closing the doors. Oregon over and out.”

Linda descended another forty feet, until the seafloor was just a yard or two below the mini, and set her course for the Bandar Abbas naval base. She kept her speed to just above a crawl so the sound of the propellers churning the water wouldn’t alert any attentive sonar operators in the area, although with the amount of traffic in the Strait of Hormuz it would be next to impossible to single out the whisper-quiet Nomad amid the acoustical clutter.

They were at risk of visual detection because the waters were so shallow, forcing her to leave off the external lights. She would have to rely on the LIDAR system, or Light Detection and Ranging system, which used a series of reflected lasers to map out the terrain immediately in front of the sub. She would get them to the base by following the three-dimensional computer representation of their surroundings.

The LIDAR could detect objects as small as a soda can.

“This is your pilot, up here in the cockpit,” she called over her shoulder. “We will be cruising at an altitude of negative forty-eight feet at a speed of three knots. Our estimated arrival time at our destination is approximately sixty-two minutes. At this time, you may use approved electronics, and don’t forget to ask an attendant about our frequent-flier program.”

“Hey, Pilot, my peanuts are stale,” Linc called up to her.

“Yeah, and I want a blanket and a pillow,” Eddie added.

Max chimed in, “While you’re at it, a double Scotch would hit the spot.” Listening to the banter over the next half hour, one would have never known they were about to infiltrate Iran’s most heavily secured naval facility. It wasn’t that they weren’t aware of the risks. It was just that they were too professional to let that wear on their nerves.

But all that dried up with thirty minutes to go. The shore team started putting on their scuba gear, checking and rechecking each other’s equipment as they went. When they were suited up, Juan and Linc slid their way into the phone booth-sized air lock. There was a hatch in the ceiling of the claustrophobic chamber that could be opened from the cockpit or from inside the air lock, but only when the pressure on each side of the armored door was equalized. To save time, Juan hit the controls that allowed seawater to slowly fill the chamber. The water was blood warm as it climbed up their bodies, pressing in on Juan’s dry suit. Juan had to smooth out the wrinkles so the suit wouldn’t chafe. Both men had to work their jaws to ease the pressure on their inner ears.

When the level was just below their necks, Cabrillo hit the button again. There was no need to put on their dive helmets until the last moment.

“How are you doing back there?” Linda’s voice was tinny and distant through the helmet.

“Why is it I always get stuck in this thing with the biggest member of the crew,” Juan cried theatrically.

“’Cause Max’s belly’s too big to fit in there with Linc, and Eddie would be squashed like a bug,” Ross said.

“Hey, man, just be thankful I don’t take a deep breath,” Linc joked in his deep baritone.

“Chairman, the LIDAR is picking up the submarine pen’s doors. We’re about fifty yards away.”

“Okay, Linda. Put us on the bottom to the right of the dry dock’s entrance.”

“Roger.”

A moment later, the Nomad shuddered slightly as Linda settled it onto the sandy seafloor. “Powering down all nonessential equipment. Whenever you’re ready.”

“What do you say, big man?” Cabrillo asked Lincoln.

“Let’s do it.”

Juan put on his helmet, making sure the locking rings to keep the suit watertight were secure and that he was getting sufficient air from the tanks. Cabrillo waited until Linc gave him the dive signal for “OK” before opening the flood valve again. The water quickly rose to the air lock’s ceiling. He doused the lights and hit another toggle to open the door.

The hatch swung upward, releasing a small amount of trapped air. The bubbles were silver-white in the gloom, but with waves lapping against the enclosed pier they wouldn’t be spotted.

Juan hoisted himself out of the dive chamber and paused on the submersible’s upper deck. Without lights, the water was as dark as ink. Cabrillo had grown up in southern California and had been drawn to the sea for as long as he could remember. He graduated from skin diving to scuba diving and from body boarding to surfing in his early teens. He was as comfortable in water as a seal and was almost as powerful a swimmer. The darkness only enhanced the calm he felt whenever he dove.

Lincoln emerged from the Nomad a moment later. Juan closed the hatch, and together they waited for Eddie and Max to cycle through. Once they were all out of the submarine, Cabrillo chanced turning on an underwater flashlight, shielding the beam from the surface with his hand.

The Iranian submarine pen had been built by first excavating a six-hundred-foot-long, hundred-foot-wide trench from the ocean eastward into the desert. Over this, they erected a reinforced-concrete shell, supposedly eight feet thick and capable of withstanding a direct bomb hit. It had been built before the U.S.-led invasion of neighboring Iraq, and the Iranians must be well aware that some of the bunker busters in the American arsenal now could level the entire structure with a single hit. To the south and north of the dry dock sat the main piers of the naval base, while administration buildings, machine shops, and barracks sprawled for two miles inland.

On the seaward side of the pen were two massive doors that swung outward hydraulically. Inflatable bladders sealed the gap between the bottom of the door and a cement pad to keep water from flooding into the building. Short of explosives or a couple of hours with an acetylene cutting torch, the doors were impenetrable.

Cabrillo finned away from the doors, leading his team through the stygian realm. Every few moments, he would flash his light along the barnacle-encrusted seawall protecting the base from the ravages of the ocean. After fifty feet, the beam settled on what he had been searching for. There was a four-foot-wide culvert in the wall, a dark hole that fed the pumps to drain the dry dock. Careful to protect the light, he inspected the metal grille embedded in the concrete that prevented anything from swimming up the conduit. The steel was only slightly corroded, while the concrete maintained its integrity. It took him over a minute of careful inspection to spot the wires at the top and bottom of the six metal rods.

One way to protect against tampering was to rig the grates with motion detectors, but with so many curious fish in the Persian Gulf the alarms would sound almost constantly. The easier way was to run an electric current through the metal, and if the connection was ever cut guards would be alerted that someone had removed part of the grille.

Juan pointed the wires out to Linc, the Corporation’s best infiltration specialist. Working mostly by feel, Lincoln rigged bypasses on three of the steel rods, using alligator clamps and lengths of wire to keep the current flowing. Next, he removed two squeeze tubes from his dive bag. He uncapped one tube and applied a bead of a gray puttylike substance around the ends of the bars. He then applied an equal amount of putty from the second tube over the first.

Inert when separated, the two compounds formed a caustic acid when combined. In less than a minute, the metal under the beads had been eaten away enough for Linc to snap them free, his loose wires still keeping the circuit closed and the alarms silent. He set the broken rods on the sand, making sure he didn’t touch the still-corrosive tips, and held the slack wires apart for Max, Eddie, and Juan to slip through before carefully sliding into the pipe himself.