Just spotted in AIS that Royal Navy’s HMS Defender has teleported to the Arctic…
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The first thing I thought of was to gauge whether a (radar) target who was on an intercepting course would react to a (AIS spoofed) change in course. Such a thing could help in early detection of potential piracy attempts. Assuming one had better radar than the potential pirates which, I should think, would normally be the case.
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Appreciating that this discussion was a few years ago now, but hoping that I may seek a view from the collective expertise here in this forum. Investigating a case of apparent mass spoofing event / anomaly in position data for an apparently unrelated cohort of 211 vessels. Not clear if it is GPS jamming, radar interference. Any interested parties available to advise, please reply to my thread here! Many thanks.
US NAVCEN tracks GPS anomalies, you can report them here:
https://www.navcen.uscg.gov/contact/gps-problem-report
Or you can view reports to see if someone else has reported something here:
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Radar <> GPS. Was everyone’s GPS off, radar full of noise/fake targets, or both at once?
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thankyou @Meme.Lord this is interesting and useful!
very hard to say just yet - this is a group of about 210 vessels unrelated in terms of owner, operator. We think there may have been 3 distinct events hidden in a much larger cloud of fake / erroneous positioning data
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What kind of data set are you looking at?
This is AIS and S-AIS - mostly the latter - for approx. 6500 data points over 1 month
OK - that would not change a radar display that was strictly radar, if you have AIS overlay on then you would see AIS targets near you that did not reflect radar and radar targets with no corresponding AIS to go with them.
See this for an update: GPS Spoofing Signals Traced To Tehran - AVweb
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Anyone miss LORAN yet? That system is very hard to impossible to either spoof or jam.
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Europe was putting it back in once they knew gps can be easily spoofed but then it died. Never heard why.
E-loran worked great, the units had almanacs in them so all the known issues where calculated out. The units looked and worked just like gps
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Thankyou, this is very interesting. I need to study about eLORAN. I had been given to understand that GALILEO was quite robust, quoting here an article int he New York Times on 27 Nov:- ‘Only the European navigation satellite system, Galileo, incorporates an authentication system that can provide confidence that a signal is from its satellites. Galileo, which currently is the most accurate and precise navigation satellite system, plans to introduce an even stronger level of authentication, according to a spokesperson for the European Commission.’
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if they didnt waste the money on galileo they could of installed e-loran every where.
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From Mike Schuler article today on main site…
" Maritime AI specialist Windward reports that GPS spoofing likely caused the containership MSC ANTONIA to run aground near the Eliza Shoals close to Jeddah Port on May 10, 2025"
I note that UKMTO had issued this warning the day before…
Just had a look at MarineTraffic - still lots of spoofery around today north of Jeddah Isl. Port.
A family friend, UNH professor Al Frost (RIP), was heavily involved and a huge proponent of Loran. I’m sure he was devastated.
ETA: I’m none too pleased myself.
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There is a project on the Antarctic Continent where a device can detect all lightning strikes and their positions world wide - and the research is underway to use this as a positioning system. Super duper cool… New Global Navigation System Could Guard U.S. Military Against GPS-Attacks
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I’ve heard that the military already has something else.
Good thing nobody cares about non-electronic navigation anymore.
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