North Korea zombie boat tease 02
Hong Kong CNN  — 

The United Nations brought down the hammer and that was it for the Hao Fan 6.

On October 10, the hulking, 460-foot (140 meter) cargo ship was banned from entering every single port across the globe, punished for violating sanctions on North Korea.

It was just south of South Korea the day the news was announced, according to tracking information by MarineTraffic. Its transponder pinged continuously until 11:17 p.m. Coordinated Universal Time, the data showed.

Then the Hao Fan 6 disappeared.

The Hao Fan 6 seen in South Korea in 2015.

Fighter jets under sugar

The Hao Fan 6 was one of four ships the UN slapped with global port bans.

But it’s not the first time North Korean ships have been sanctioned. The Jie Shun, one of the four banned ships, was caught by Egyptian authorities smuggling thousands of North Korean rocket-propelled grenades in 2016. Panamanian authorities detained the Chon Chon Gang in 2013 after finding MiG fighter jets, anti-aircraft systems and explosives hidden under bags of sugar.

Now, the net seems to have widened. The UN has recently passed resolutions blocking North Korea’s ability to export goods like coal and metal ores – big moneymakers for Pyongyang, that help fund everything from the lavish lifestyles of North Korea’s elite to its rapidly advancing nuclear and missile programs.

US Secretary of State Rex Tillerson renewed the call after North Korea tested a long-range ballistic missile in late November. He said the international community needs to take additional measures against the country, “including the right to interdict maritime traffic transporting goods to and from the DPRK (Democratic People’s Republic of Korea).”

“Shipping is the area that is in the most trouble now given the squeeze by the sanctions,” said George Lopez, a former member of the UN Panel of Experts on North Korea who now teaches at the University of Notre Dame. “Once you’re in a situation like you are in now, when there’s virtually no exports allowed, then you get a chance to really interdict virtually everything.”

The sanctions dovetail with US President Donald Trump’s plan to quash North Korea’s nuclear march by putting together a global coalition dedicated to cutting off North Korea’s cashflow. The hope is to eventually get the hermit nation’s leader, Kim Jong Un, to relinquish his nuclear arsenal in exchange for sanctions relief.

The US Treasury Department has gone even further than the UN, sanctioning 59 vessels for their dealings with North Korea. But independent North Korea watchers have identified as many as 180 ships connected to the hermit state, which begs the question: How many North Korean ships like the Hao Fan 6 are still roaming the high seas, bringing in cash for the Kim regime?

A ship crosses dry land

The Hao Fan 6’s journeys in the weeks before the ban show the massive ship, which can transport 8,343 tons of cargo, appearing to travel on land across large swaths of South Korea.

These aren’t errors. They’re clues.

Most modern vessels are tracked using an Automatic Identification System (AIS) transponder. The International Maritime Organization stipulates large ships must have one on board.

Turn it off and a ship can hide from prying eyes or potential threats. Once turned back on, tracking data will show a big and unusual jump.

“There is little that can be done to prevent captains independently switching them off,” Andrea Berger, a senior research associate who specializes in North Korea’s weapons programs and sanctions at the Middlebury Institute of International Studies, told CNN.

After going silent on October 10, the Hao Fan 6 didn’t turn on its transponder for the rest of the month.

Berger said it’s common for North Korean-linked vessels engaging in illegal behavior to turn off their transponders for periods of their voyage.

Experts say transponders are usually shut off if a ship is being threatened, often due to piracy.

Three trips to North Korea

The Hao Fan 6’s historical data shows three visits to North Korea in 2016 and activity on traditional coal shipping routes.

Twice in the fall it was tracked near a North Korean port city, Nampo. The first time was September 27.

The Hao Fan 6 next pinged on October 17. It was near Lanshan, a coastal city in China with a port and coal terminal. Tracking data shows the ship then headed back to Nampo. It was off the North Korean coast again on October 20. Then it went silent for days.

If the Hao Fan 6 was transporting coal, it would’ve been in violation of a UN Security Council Resolution passed in March 2016. The Security Council has passed multiple rounds of sanctions since, most recently in September this year.

CNN asked Hugh Griffiths, the coordinator of the UN Panel of Experts on North Korea – the body charged with monitoring the enforcement and efficacy of sanctions on the hermit nation – about the possibility the Hao Fan 6 was moving coal. He did not comment, but said it’s vital that UN members fully implement Security Council resolutions.

“Part of that is very much paying close attention to vessels delivering coal,” Griffiths said.

Coal has provided a crucial economic lifeline for Pyongyang. In 2015, coal exports netted nearly a billion dollars of revenue, according to UN data. Chinese companies were big buyers, as North Korean coal is close by and cheap.

Marshall Billingslea, the assistant secretary for terrorist financing at the US Treasury Department, in his testimony to the US Senate in September, used satellite imagery and AIS data to show three ships transporting illicit North Korean coal – and turning off their AIS transponders while doing so – while traveling between China and Russia.

More recently, Nikki Haley, the US ambassador to the United Nations, called for the global community to do more to crack down on North Korean sanctions violations.

“This Council has banned coal exports from North Korea. And yet, we have reports of the regime continuing to smuggle coal into neighboring Asian countries using deceptive tactics to mask the coal’s origins,” Haley told the United Nations shortly after the November North Korean missile test.

Two offices in Hong Kong

On paper, the Hao Fan 6 is owned by a Hong Kong-based company – Trendy Sunshine Hong Kong Limited. The company’s address is listed as the 10th floor of Hong Kong’s Billion Centre, according to Equasis – a shipping information database developed by European Union and French Authorities – and publicly available corporate records provided to the Hong Kong government.

When CNN visited the building, Trendy Sunshine was not there. Instead, the office, with its gleaming marble foyer and glass walls overlooking Hong Kong’s iconic Victoria Harbor, is the headquarters for SBC International, Trendy Sunshine’s company secretary.

A sign for SBC International at Hong Kong's Billion Centre.

In Hong Kong, it’s not illegal for companies to share an address