The only narco submarine ever captured is a 73-foot-long camouflaged vessel capable of carrying at least 7 tons of cocaine while cruising stealthily beneath the ocean's surface. In the seven months since the game-changing discovery of the submarine, built by drug traffickers in a covert shipyard deep in the Ecuadorean jungle, naval experts from multiple countries have studied the vessel. Their conclusion: It is the "real deal" — fully capable of making multiple journeys to North America.