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    Re: New Scientist: GPS mystery is making ships appear to teleport and move in circles
    From: Doug Faunt
    Date: 2020 Dec 12, 17:29 -0800
    Actually, I've not seen that this is actually GPS spoofing, but easily could be AIS spoofing instead.
    But I've not dug into it.

    On Sat, Dec 12, 2020 at 4:02 PM Paul Saffo <NoReply_PaulSaffo@fer3.com> wrote:

    I wonder why all the signals are pointing to Pt. Reyes. Might it have something to do with that Utah monolith? ;-)


    GPS mystery is making ships appear to teleport and move in circles

    TECHNOLOGY 4 June 2020
    By  David Hambling

    Ships around the world are reporting false locations, seeming to circle Point Reyes near San Francisco when they are actually thousands of kilometres away.

    The locations are broadcast by each ship’s Automatic Identification System (AIS). These are required under international law to signal a vessel’s identity and GPS location. Bjorn Bergman of the environmental watchdogs SkyTruth and Global Fishing Watch discovered the anomalies from a historical database of AIS information.
    Bergman was tipped off when he noticed records from 2018 and 2019 of satellites receiving AIS locations outside areas they cover, for example, a satellite over West Africa picking up a ship supposedly off California. Vessels affected included a livestock carrier near Libya, a cargo ship in the Suez Canal, a small boat off Chile and a Norwegian tug.

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