From The Washington Post:
MEXICO CITY -- When anti-narcotics agents first heard that drug cartels were building an armada of submarines to transport cocaine, they thought it was a joke.
Now U.S. law enforcement officials say that more than a third of the cocaine smuggled into the United States from Colombia travels in submersibles.
An experimental oddity just two years ago, these strange semi-submarines are the cutting edge of drug trafficking today. They ferry hundreds of tons of cocaine for powerful Mexican cartels that are taking over the Pacific Ocean route for most northbound shipments, according to the Colombian navy.
The sub-builders are even trying to develop a remote-controlled model, officials say.
"That means no crew. That means just cocaine, or whatever, inside the boat," said Michael Braun, a former chief of operations at the U.S. Drug Enforcement Administration.
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My Comment: Considering the money that some of these cartels are pulling in, I expect better subs. I guess with time they will have them.