Swarms of Satellites Are Tracking Illegal Fishing and Logging

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Swarms of Satellites Are Tracking Illegal Fishing and Logging
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In some of the world’s most inaccessible places, tiny satellites are watching—and listening—for signs of destruction.

washing up in Japan with dead North Koreans on board. Dozens were documented every year, but they spiked in 2017, with more than 100 boats found on the northern coasts of Japan. No one could explain the appearance of these ghost ships. Why were there so many?

The alarming discovery was made possible by the DC-based firm Spire Global, which operates more than 100 small satellites in Earth orbit. These are designed to pick up the radio pings sent out by boats across the globe, which are primarily used by vessels to avoid each other on the seas. Listening out for them is also a useful way to track illegal maritime activity.

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