Dark Fleet Spoofing – Inside GNSS

December 31, 2025

Written by Editor

Image: Shutterstock

What’s new: A “European perspective” from my colleague Peter Gutierrez at Inside GNSS.

Why it’s important: Peter makes a number of important points:

  • The AIS spoofing incident is not an isolated incident but part of a broader signal-integrity crisis.” If it is a “crisis,” it is one that has brewing on for a long time. The world started seeing publicized spoofing of ride-share apps in Moscow and of maritime in the Black Sea in 2017. The Russians were using it as a first line of defense against drones that might be targeting their VIPs.
  • “AIS spoofing has become a hallmark of opaque, sanctions-busting operations,” –  It is not just oil tankers evading sanctions. All manner of vessels wishing to conceal their location and activity, whether it is illegal fishing, human trafficking, or any other malicious activity, can and often do spoof their location. See this item from 2020.
  • “The episode underscores the urgent need for resilient positioning, authentication, and cross-sensor verification.” – True that. Pretty much RNTF’s theme for over a decade.
  • “Without such measures, the dark fleet will continue to navigate invisibly, even as its shadows extend across continents.” First, government leaders need to care about resilient PNT and the bad things that can happen without it. Once they do, they will find they have lots of tools to sanction spoofing and lots of ways to institute resilient PNT.

What else to know: 

  • There were lots of reasons under international law for the U.S. or other nation to board and seize M/T Skipper. Peter mentions sanctioned oil. The ship was also violating ITU regulations by broadcasting false information.
  • What makes this seizure a slam-dunk, though, is that the ship was flying the Guyana flag, but when the US Coast Guard checked, Guyana said “it’s not one of ours.” That means the ship was “stateless” – the same category as a pirate. Since maritime is lightly governed, any nation can board and take enforcement action against a stateless vessel. 
  • We were involved in the earliest stages of Maritime Domain Awareness and AIS being implemented. At the time, we all realized spoofing was possible. The “common wisdom,” though, was that spoofing wasn’t something to worry much about because it could be easily detected and the bad guys would just be inviting enforcement action. Anomalies would be a good thing.  As it turned out, there are so many bad guys in maritime, and there are so many anomalies, few nations are willing to devote the resources needed to take action and address the problem. Doing things right takes time, effort, and money. And doing things wrong doesn’t work…

This has been going on a long time. See for example this NY Times article from 2020. We have to conclude that  authorities have been turning a blind eye for some reason…

 

InsideGNSS-logo

 

Dark Fleet Tanker Spoofing Exposed Off Venezuela

What Can YOU Do? How Can YOU Help?

PNT is the quiet backbone of everything but too many leaders still don’t see the risk.

But you do. You understand the systems, the dependencies, the failure chains. That insight is rare — and it’s exactly what your country needs right now. Contact your government leaders and industry decision-makers and tell them resilient PNT isn’t a feature — it’s the foundation everything else depends on.

Start the Conversation

Use our Resilient PNT Key Talking Points to make the case.

U.S. Advocates

Find your representatives at Congress.gov, then use our email template to reach them in minutes.

When you get a response, let us know. Every conversation strengthens the mission.

More PNT News

Munich 9 Years On: Same Message, More Urgency – Inside GNSS

Munich 9 Years On: Same Message, More Urgency – Inside GNSS

Image: Shutterstock What's new: RNTF President Dana Goward's column for the May/June edition of Inside GNSS+. Why it's important: It discusses a PNT example of how concern within the tech community does not necessarily turn into action by political leaders. Or at...

US Congress hearing on PNT –  June 4th

US Congress hearing on PNT – June 4th

Image credit: House Energy and Commerce Committee What's new: A congressional hearing titled Where Are We?: Examining Positioning, Navigation, and Timing Capabilities in the United States. Why it's important:  The hearing is being held by the Communications and...

GPS NOTAMS Not Enough for Safety – Jeremy Bennington at Spirent

GPS NOTAMS Not Enough for Safety – Jeremy Bennington at Spirent

Image: Jeremy Bennington What's new: An important opinion piece on LinkedIn by RNTF member Jeremy Bennington at Spirent about intentional GPS disruption and aviation safety. Why it's important: People's lives are at stake. False contacts, bad locations, relying on...

UK Defence Minister’s Aircraft Jammed… Again – BBC

UK Defence Minister’s Aircraft Jammed… Again – BBC

Image: GPSJam.org - Jamming in the Baltic the day of the minister's flight What's new: The aircraft carrying another high ranking official experienced jamming in northern Europe. Why it's important: Even though jamming impacts tens of thousands of ordinary people on...

Get PNT News in Your Inbox