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It's official: US joins fight against Asia pirates

The U.S. formally joined the main organization combating maritime piracy in south Asia on Tuesday, throwing its weight behind a multi-national effort to secure some of the world's busiest shipping lanes.

A map inside the IMB's (International Maritime Bureau) Piracy Reporting Centre (located in Kuala Lumpur) shows where pirate attacks have been occurring in recent years.
Jonas Gratzer | LightRocket | Getty Images

As CNBC reported last week, piracy is mushrooming in the area of the Strait of Malacca and Singapore Strait, a shipping bottleneck that sees one-third of the world's annual commercial maritime traffic, making it the busiest waterway on earth.

The U.S. becomes the 20th member of ReCAAP, a Singapore-based organization that's working against maritime crime in the region. Piracy there increasingly includes not just quick robberies but the theft of entire cargoes—especially fuel oil and other petroleum products, which pirates sometimes siphon off onto their own tankers.

Read MoreCrime on the high seas: The world's most dangerous waters

"U.S. membership in ReCAAP will enable us to support multilateral cooperation in addressing the common threat of piracy and robbery against ships in the region's critical sea lanes and waters," a U.S. State Department official told CNBC on Tuesday.

The Strait of Malacca and Singapore Strait handle all of the Persian Gulf oil that makes its way to the big economies of Asia, including China, Japan and South Korea. It also handles most trade between Europe and China.

"The high-risk waters of the Strait of Malacca are a concern for our U.S.-flagged vessels," Robert Gauvin, executive director of piracy policy at the U.S. Coast Guard, said last week. He added that joining ReCAAP will "provide a higher level of security and lessening of the threat to those vessels."

Crime on the high seas

Pirates in the area of the straits primarily make money by reselling stolen products on the black market, sometimes by siphoning off entire liquid cargoes onto their own tankers and then fleeing. Their business model has led most experts on piracy in the region to speculate that organized crime is at play in Asian piracy.

Rear Admiral Paul F. Thomas, assistant commandant for prevention policy at the U.S. Coast Guard, will serve as the top U.S. ReCAAP officer, the organization said.

President Barack Obama started the United States on the road to ReCAAP membership in 2012. The United States and a group of primarily Western European allies began combating piracy in Somalia at the end of the last decade and have succeeded in almost wiping out piracy from that region.

Current prominent members of ReCAAP include China, India, Japan, Singapore and the United Kingdom.

Indonesia and Malaysia, while fighting piracy themselves, have not joined ReCAAP. Indonesia has cited sovereignty issues for not joining.

—By CNBC's Ted Kemp.