The clatter of helicopter blades echoed across the jungles of northwestern Ecuador. Antinarcotics commandos in three choppers peered at the mangroves below, scanning for any sign of activity. The police had received a tip that a gang of Colombian drug smugglers had set up a clandestine work site here, in a dense swamp 5 miles south of Colombia’s border. And whatever the traffickers were building, the tipster had warned, was truly enormous.
For decades, Colombian drug runners have pursued their trade with diabolical ingenuity, staying a step ahead of authorities by coming up with one innovation after another. When false-paneled pickups and tractor-trailers began drawing suspicion at US checkpoints, the cartels and their Mexican partners built air-conditioned tunnels under the border. When border agents started rounding up too many human mules, one group of Colombian smugglers surgically implanted heroin into purebred puppies. But the drug runners’ most persistently effective method has also been one of the crudest—semisubmersible vessels that cruise or are towed just below the ocean’s surface and can hold a ton or more of cocaine.
Assembled in secret shipyards along the Pacific coast, they’ve been dubbed drug subs by the press, but they’re incapable of diving or maneuvering like real submarines. In fact, they’re often just cigarette boats encased in wood and fiberglass that are scuttled after a single mission. Yet despite their limitations, these semisubmersibles are notoriously difficult to track. US and Colombian officials estimate that the cartels have used them to ship hundreds of tons of cocaine from Colombia over the past five years alone.
But several years ago, intelligence agencies began hearing that the cartels had made a technological breakthrough: They were constructing some kind of supersub in the jungle. According to the persistent rumors, the phantom vessel was an honest-to-goodness, fully functioning submarine with vastly improved range—nothing like the disposable water coffins the Colombians had been using since the ’90s. US law enforcement officials began to think of it as a sort of Loch Ness Monster, says one agent: “Never seen one before, never seized one before. But we knew it was out there.”
Finally, the Ecuadoreans had enough information to launch a full-fledged raid. On July 2, 2010, a search party—including those three police helicopters, an armada of Ecuadorean navy patrol boats, and 150 well-armed police and sailors—scoured the coastline near the Colombian border. When a patrol boat happened on some abandoned barrels in a clearing off the Río Molina, the posse moved in to find an astillero, or jungle shipyard, complete with spacious workshops, kitchens, and sleeping quarters for 40. The raid had clearly interrupted the workday—rice pots from breakfast were still on the stove.
And there was something else hastily abandoned in a narrow estuary: a 74-foot camouflaged submarine—nearly twice as long as a city bus—with twin propellers and a 5-foot conning tower, beached on its side at low tide. “It was incredible to find a submarine like that,” says rear admiral Carlos Albuja, who oversees Ecuadorean naval operations along the northwest coast. “I’m not sure who built it, but they knew what they were doing.”

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