Reports of both GPS Jamming and Spoofing has been around for some time now.
Here is a fresh report about the experience of jamming by pilots flying “bush” in Finnmark, Norway:
For those who may not know:
What is the difference between GPS Jamming and Spoofing? - everything RF.
But the Wideroe staff keeps the spirit up regardless:
I’m sure this article has probably been shared on here before, but in case anyone hasn’t seen it, I found the piece below from the MIT Technology Review to be very interesting:
Finding the ground transmitter is not that hard considering the attack is in the same area.
Makes you wonder who is doing it?
Why would they make the spoofing so obvious by arranging the contacts in circles ?
Are your ship’s electronic charts telling the truth? Tune in to this essential episode for marine professionals as we uncover the stealthy and growing threat of GPS spoofing.
Drawing on authoritative insights from Capt. Raghu Sharma’s article in The DeepDraft, we break down how attackers use high-end laptops and software-defined radios (SDR) to broadcast fake satellite signals and secretly alter a ship’s coordinates. Unlike GPS jamming, which simply blocks signals with noise, spoofing is a highly deceptive attack that triggers no equipment alarms, leaving navigators completely unaware that their navigation equipment has been compromised.In this episode, we cover:
The Mechanics of a Cyber Attack: How hackers fabricate pseudorandom noise (PRN) codes and use the delicate “drag-off” technique to gently override true satellite signals.
The ECDIS Danger: The severe consequences and potential for collisions if officers rely solely on automated GPS position fixing in congested waters, such as the English Channel.
Detection & Defense Tactics: Why traditional navigation tools—including Parallel Indexing, Radar Overlay, Echo Reference, and visual or celestial fixes—are critical for spotting spoofing anomalies early.
Technical Countermeasures: How the maritime industry can protect itself by adding anti-spoofing sensors, blockers, and utilizing modernized civil GPS signals.
Stay one step ahead of maritime cyber threats. As Capt. Sharma reminds us: “Good navigation is about cross-checking navigation systems, and what better way than having two independent electronic systems”
Detailed Analysis On -
GPS Spoofing: How False Satellite Signals Can Mislead Ship Navigation – The DeepDraft
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GPS Interference Off California Offers Warning for Global Shipping
Thought it was Russians or Iranians
Its amazing to think there wasnt any shipping until GPS invented
Yes it is. Before GPS was sat Transit with doppler fixes , was Omega , was Decca and Decca differential, Loran C ( do not remember if it had differential option) , there were radio bearings, radar bearings and variable ring fixes, parallel indexing, visual bearings, running fixes, there were sextant celestial and landmark fixes, echosounder , and finally that was DR which if practiced diligently and backed by fixes provided acceptable results and there was common sense and understanding what one was doing.
But honestly I would be very uncomfortable sailing w/o radar as it always was available. So may be it is generational thing. If sb started as navigator having GPS available 24/7/365 with 10 mtr accuracy then no wonder somebody feels great discomfort when it is gone.
Tell the engineers from air-conditioned ECR where all is controlled by software and sophisticated automation to switch it off and operate the ME from emcy stand with old fashion telegraph and watch their faces. 
Yesterday I noticed a Bahamas patrol boat shown on AIS as being in the North Sea, not far from the southern tip of Norway.
Departure and destination ports given were both in the Bahamas.
