Cabrillo had no desire to get caught in a cross fire from nervous border guards, so rather than cross this particular line he was going to go under it.

The RHIB was loaded to the gunwales with iron plates—tons of them—enough to quadruple the shipping costs of sending the boat unladen. Mark Murphy and Eric Stone had figured out the exact amount needed to pull off Juan’s stunt, and now they were about to find out if his two resident geniuses were right.

Wordlessly, they got to work. Jerry and Mike installed the engine covers and made sure they were watertight while Mark double-checked that all their dive bags full of equipment and weapons were securely tied down. After inspecting the open cabin for anything that might get damaged by emersion, Juan handed over the four Draeger rebreathers. Unlike Scuba tanks, there was no telltale trail of bubbles from the German-made device. They worked by scrubbing carbon dioxide from the closed-loop system and adding oxygen from a small tank when gas ratios tipped dangerously.

The men wore micro-thin black diving suits, not so much for thermal protection—the water was blood warm—but to cover their white skin. Their dive shoes had thick rubber soles and detachable flippers in case they needed to leave the water in a hurry.

“Would be nice if we could do this closer to the border,” Jerry Pulaski commented. It was an observation hiding a mild complaint.

“Sure would be,” Juan agreed, suppressing a grin. Satellite pictures showed the next town on the river was five miles downstream. Again, if he was part of the Argentine junta, he would pay some local wharf rat to drop a dime if he saw or heard anything suspicious. In this part of the world, patriotism was a poor substitute for a full belly, so the team was in for a long night. Cabrillo turned to Murphy. “You want the honors?”

“Hell no,” Mark said. “If we got it wrong, you’re going to make Eric and me pay for the boat.”

Juan shrugged. “Good point.”

Standing chest-deep in the current, he reached over one of the inflatable fenders and opened a release valve. Air hissed from the valve under high pressure until the black rubber was limp. He nodded to Jerry to do the same on the other side, and soon they had half of them emptied. Water sloshed over the gunwale as the boat sank deeper into the river. Cabrillo and Pulaski pushed down on the hull. The boat sank farther and remained submerged, though the bow soon rose to the surface. More air was released until the RHIB was neutrally buoyant and perfectly balanced.

Not surprisingly, the calculations for the added ballast had been spot-on.

The team struggled into their rebreathers, fit full masks over their faces, and performed a communications check. There was little chance of running into crocodiles or caimans, but all had spearguns fitted into holsters strapped to their thighs.

Juan sliced the rope securing the RHIB to the hut and let the current take them. With each man holding a line attached to the boat, they swam their ungainly charge into the middle of the river. To Cabrillo, it felt like they were trying to herd a hippopotamus.