WATCH: Global Fishing Watch taps into a satellite data feed that tracks commercial ships, creating a publicly available map of commercial fishing activity around the globe.

Working late into the night in land-locked West Virginia, Bjorn Bergman helped authorities stop a fishing boat from illegally harvesting tuna and sharks thousands of miles away, off the Pacific island nation of Palau.

In late January, Bergman analyzed swiggles on his screen that represented the movements of the Taiwan-flagged fishing boat ShinJyi Chyuu 33. A records search told Bergman that the boat did not have a permit to fish in Palau’s waters, but the zig-zag patterns playing across his monitor suggested that’s exactly what the crew was doing.

Thinking he was seeing pirate fishing in action, Bergman notified Palau’s authorities, who intercepted the boat just 10 miles (16 kilometers) from the outer border of the country’s territory. Officials found

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