They have really stepped up their electronic warfare from there lately and it is non-trivial to say what is going on. But they are running massive spoofing from there. Question is, what else?
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(You said you’ll get back to spoofing but) until now, this has been mainly jamming while spoofing or meakoning is more sophisticated. Especially if you’re aiming to trick others into a faulty GNSS position they believe is valid (compared to faking your own AIS position). Which one is the case here?
Ah. The spoof map zoomed out gives an idea of the logic, that someone is giving all these receivers basically one single fake position. The transmitter overrides the weak sat signals, but unlike jamming (blocking) they may now keep navigating, falsely believing they still have a GNSS position.
In a spoofing event, a false position/time is transmitted to vulnerable receivers in the area, tricking them to appear somewhere else. These distances below shouldn’t fool anyone, but an autopilot operating under the impression of having a valid position can have catastrophic outcomes.
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This post and its replies gives you an idea of the complexities
https://bsky.app/profile/giammaiot.bsky.social/post/3lecylh5p7c2u
https://bsky.app/profile/giammaiot.bsky.social/post/3leem2cp56s2b