This post was updated on July 30, 2015.

This morning, The New York Times published the fourth installment of The Outlaw Ocean —a wide-ranging investigation into murder, exploitation, criminal pollution of waterways, and illegal fishing across our tragedy-ridden commons: the high seas.

Ian Urbina, a member of the Times’ investigations unit, has crafted some exhaustively documented stories covering everything from stowaways to the difficulties associated with monitoring international waters.

Roughly 2,000 stowaways are caught each year hiding on ships. Hundreds of thousands more are sea migrants, whose journey involves some level of complicity from the ship’s crew.

If able to stay concealed, these individuals —forced or incentivized to take such risks— fall prey to chance and circumstance.

Refrigerated fishing holds become cold, exhaust pipes heat up, shipping containers are sealed and fumigated. Maritime newsletters and shipping insurance reports offer a macabre accounting of the victims: “Crushed in the chain locker,” “asphyxiated by bunker fumes,” “found under a retracted anchor.” Most often, though, death comes slower. Vomiting from seasickness leads to dehydration. People pass out from exhaustion. They starve.

But stowaways found aboard, far beyond the territorial markers of individual countries, become mere data points and, like other crew members, are subject to the rise and fall of the market: of buyers and sellers in marginal industries, of captains trying to squeeze out the barest of profits.

According to the Times’s investigation, these men often become obstacles to be disposed of by whatever means most convenient.

Murders regularly occur offshore — thousands of seafarers, fishermen or sea migrants die under suspicious circumstances annually, maritime officials say — but culprits are rarely held accountable.

These murders can be documented —even videotaped— but accountability drowns in the same ice-cold waters.

“Summary execution, vigilantism, overzealous defense, call it what you will,” said Klaus Luhta, a lawyer with the International Organization of Masters, Mates & Pilots, a seafarers’ union. “This boils down just the same to a case of murder at sea and a question of why it’s allowed to happen.”

But the answer is as unsatisfying as the explanation is frustrating. Urbina writes:

Though the global economy is ever more dependent on a fleet of more than four million fishing and small cargo vessels and 100,000 large merchant ships that haul about 90 percent of the world’s goods, today’s maritime laws have hardly more teeth than they did centuries ago when history’s great empires first explored the oceans’ farthest reaches.

But these sea-based industries require bodies and their labor. Urbina tracks this rise to ‘sea slaves’ in the heart of southeast Asia:

While forced labor exists throughout the world, nowhere is the problem more pronounced than here in the South China Sea, especially in the Thai fishing fleet, which faces an annual shortage of about 50,000 mariners, based on United Nations estimates. The shortfall is primarily filled by using migrants, mostly from Cambodia and Myanmar.

And:

While United Nations pacts and various human rights protections prohibit forced labor, the Thai military and law enforcement authorities do little to counter misconduct on the high seas.

Into this void, however, creep private (and independently funded) organizations trying to carve off and address these persistent issues —seemingly beyond the current reach (or interests) of individual governments.  Thus, in their final segment, the Times retells the story of the Sea Shepard vigilante crews, who stalked one of the ocean’s worst offenders across 10,000 miles of ocean for 110 days.

In an epic game of cat-and-mouse, the ships maneuvered through an obstacle course of giant ice floes, endured a cyclone-like storm, faced clashes between opposing crews and nearly collided in what became the longest pursuit of an illegal fishing vessel in history.

While the pursuit culminated in the sinking of the fugitive ship, the article’s conclusion —in which the author hints the ship could have been intentionally scuttled, carrying evidence of its crimes to the ocean’s floor— leaves readers with the image of a defiant captain, his fist raised, as his infamous vessel dips below the waves.

This short summary is not —and should not— supplement for reading these stories. Urbina’s lengthy investigation isn’t is not intended as an ending, but as a beginning:

There is much at stake: A melting Arctic has expanded trade routes. Evolving technology has opened the deep seabed to new mining and drilling. Maritime rivalry and piracy have led to more violent clashes. And, with an ever more borderless economy, sea commerce is vital to many countries. “Without ships, half of the world would freeze and the other half would starve,” Rose George, a British nautical writer, said.

A hallmark of journalism committed properly is its ability to hook a reader, reeling them into a world that is both distant and inextricably connected to their everyday life. This series accomplishes just that.

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Update: Ian Urbina joined the team at Longform to discuss his project, The Outlaw Ocean. You can by clicking the Longform icon below. (One of many gems to be discovered on the Longform site)