New research shows that thousands of ships in Shanghai, the world's busiest port, are falling victim to spoofing of GPS systems that has left experts baffled
A sophisticated new electronic warfare system is being used at the world's busiest port. But is it sand thieves or the Chinese state behind it?
MIT Technology ReviewMark Harris
Context & Ripple Effects
This 2019 investigation documented large-scale GPS spoofing at Shanghai, the world's busiest port, with thousands of ships showing falsified positions and no clear culprit — an early sign that satellite navigation was becoming a contested layer rather than trusted infrastructure.
The pattern did not stay anomalous. Later reporting shows the technique going mainstream: 100+ warships from 16+ countries had locations faked to place them in disputed waters, US officials flagged sanctioned states manipulating AIS to evade law, and security researchers warned hackers could reach beyond positioning into a ship's steering and propulsion.
First-order effects
Operators calling at Shanghai cannot trust their own vessels' reported positions while transiting the port, undermining navigation, scheduling, and any cargo-tracking claim built on AIS data.
Second-order effects
States treat spoofing as a usable tool rather than a malfunction: sanctioned countries adopt AIS manipulation to evade enforcement, while faked warship positions turn disputed-territory claims into a data problem as much as a naval one.
Third-order effects
If unauthenticated GPS/AIS stays the industry default, position data becomes unverifiable at scale — pushing insurers, regulators, and logistics platforms toward independent cross-checks, a gap that centralized trackers like China's Logink cargo network are positioned to fill.
The trend: Satellite-navigation spoofing is shifting from a localized anomaly into an instrument of statecraft and evasion across global shipping.
This is a very weird, terrifying, and potentially very important story—someone, maybe criminals, maybe the Chinese military, is messing with GPS around Shanghai in ways that we've never seen before: https://www.technologyreview.com/ ...
@elidourado
Eli Dourado on x
If you run a system that relies on GPS, I hope you are giving some thought to adversarial behavior. https://www.technologyreview.com/ ...
@c4ads
@c4ads on x
NEW: We have found evidence of GPS spoofing taking place in the Port of Shanghai, China. In this thread, we take a deeper look at this activity. For more, read Mark Harris' excellent report in MIT's @techreview. (1/7) https://www.technologyreview.com/ ...
@techreview
@techreview on x
Thousands of ships in the world's busiest port, are falling victim to a mysterious new weapon that is able to spoof GPS systems in a way never seen before. But is it sand thieves or the Chinese state behind it? https://www.technologyreview.com/ ...
@howelloneill
Patrick Howell O'Neill on x
This is an interesting whodunnit about mystery GPS hacking in the world's busiest port: “To be able to spoof multiple ships simultaneously into a circle is extraordinary technology. It looks like magic.” https://www.technologyreview.com/ ...
@techreview
@techreview on x
Thousands of ships in Shanghai, the world's busiest port, are falling victim to a mysterious new weapon that is able to spoof GPS systems in a way never seen before. by @meharris https://www.technologyreview.com/ ... https://twitter.com/...
@jasonarterburn
Jason Arterburn on x
Our latest on GPS spoofing, this time in Shanghai, #China. At @C4ADS, we're using open data to show how state- and non-state actors deploy destabilizing emerging technologies. Check it out in the MIT @techreview: https://twitter.com/...
@3ncr1pt3d
@3ncr1pt3d on x
I've been researching GPS for “what if” scenarios. Struck by the chasm between reliance vs security https://twitter.com/...
@jstrauss
J-Strizzle on x
This was the plot of a Pierce Brosnan Bond movie (the one where the villain was Rupert Murdoch) https://en.wikipedia.org/... https://twitter.com/...
@jmulvenon
James Mulvenon on x
Fascinating mystery. Ghost ships, crop circles, and soft gold: A GPS mystery in Shanghai. A sophisticated new electronic warfare system is being used at the world's busiest port. But is it sand thieves or the Chinese state behind it?https://www.technologyreview.com/ ...
@scs_news
@scs_news on x
“But one thing is for certain: there is an invisible electronic war over the future of navigation... and GPS is losing.” A possibility is that the Chinese state “is testing out a new electronic weapon, perhaps for eventual use in disputed #SouthChinaSea” https://www.technologyrev…