At $2 million apiece, the craft poke out only a foot above water and can carry 12 tons of drugs.
Drug cartels have turned to a new and effective vehicle to smuggle their goods, using small, homemade "semi-submersibles" that are hard to detect and yet effective at carrying millions of dollars worth of cocaine and other illicit drugs that end up in the United States.
Military officials who oversee Latin and South America have grown alarmed by the increased use of these boats, which poke out above the water only a foot or so but carry more than 12 tons of cargo. The military's ability to interdict the craft is hampered in part because its attention has been focused on the wars in Iraq and Afghanistan and on border security.
"We're in a holding pattern," says Rear Adm. Joseph Nimmich, who heads a military joint task force in the Florida Keys overseeing the drug fight. "We are maintaining our own but not making huge progress."
The semi-subs, known as "self-propelled semi-submersibles," also represent a serious national security threat: Today it's drugs, but tomorrow's cargo could be heavy weaponry, senior defense officials warn.
Interdictions set to double from 2006
Military officials, working in conjunction with the US Coast Guard and law-enforcement agencies, say they apprehended about 25 of the hard-to-find semi-subs a couple of years ago but this year are on track to find as many as 60. Another military official says that number could be as high as 100 by the end of the year.
Meanwhile, the semi-subs have an estimated success rate – actual delivery of cargo – of about 80 percent, Admiral Nimmich says, adding that he is confident the US can tackle the problem given more focus and resources.