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Windward on dark fleet: What the Venezuela tanker seizure signals

Company highlighted US’ seizure of tanker “Skipper” and how this indicates that the dark fleet’s days of operating with impunity are numbered.

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RESIZED Shaah Shahidh on Unsplash

Maritime AI™ company Windward on Tuesday (16 December) wrote an article highlighting US’ seizure of tanker Skipper and how this indicates that the dark fleet’s days of operating with impunity are numbered: 

From Monitoring to Intervention

The dark fleet – tankers engaging in dark activities while moving sanctioned oil, cycling through false flags, and obscuring ownership – has continued to expand, reaching more than 1,900 vessels by the end of Q3. Governments had visibility into this activity. What was less consistent was how that intelligence translated into enforcement outcomes.

That changed with the seizure of Skipper.

When U.S. forces boarded and seized the large crude carrier off the coast of Venezuela, it marked a shift in how sanctions enforcement is being applied. The operation did not rely on a military escalation or a declared conflict. It was grounded in documented sanctions violations, false flagging, and the vessel’s lack of legitimate nationality.

For years, dark fleet vessels operated in the space between detection and consequence. The Skipper seizure shows that this space is narrowing. Vessels that rely on spoofing, false registries, and legal ambiguity are now facing direct intervention, not just continued monitoring.

What the Skipper Seizure Reveals About the Modern Dark Fleet

Skipper was not an outlier. It represented the dominant operating model of today’s dark fleet.

Sanctioned in 2022 for its role in an oil-smuggling network tied to Iran and Hezbollah, the vessel continued operating by exploiting systemic weaknesses. It broadcast AIS data that later proved inconsistent with its true movements.

At the time of the boarding, Skipper’s AIS placed the tanker more than 500 nautical miles away, off the coast of Guyana. Windward’s Remote Sensing Intelligence showed otherwise. Satellite-based detections confirmed the vessel was nowhere near its declared position and had been conducting GNSS manipulation since October 28, broadcasting false coordinates while covertly loading sanctioned crude at Venezuela’s José terminal.

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Its position reappeared more than 360 nautical miles from its last spoofed signal. It sailed under the flag of Guyana, a registry that has not existed since 2021, rendering the vessel effectively stateless.

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This combination – sanctions exposure, AIS manipulation, and false flagging – is now common. Roughly 400 tankers are currently broadcasting affiliation with fraudulent registries listed by the International Maritime Organization, with nearly 300 already sanctioned. Together, they form part of a broader dark fleet of around 1,000 tankers transporting sanctioned oil for Russia, Iran, and Venezuela.

What distinguishes Skipper is not its behavior, but the response it triggered.

What Has Changed in Enforcement Posture

The seizure of Skipper reflects a more direct application of existing sanctions authorities rather than a new legal framework.

The day after the seizure, the United States sanctioned six shipowners whose VLCCs had been transporting Venezuelan crude. According to the U.S. Treasury, four of those vessels manipulated AIS to conceal port calls and vessel movements. These practices were already well documented. What changed was how that information was acted upon.

In Skipper’s case, the vessel was sanctioned, falsely flagged, and effectively stateless. Those conditions removed many of the protections that dark fleet operators have historically relied on to continue trading despite enforcement pressure. The seizure did not require a military escalation or a new sanctions regime. It relied on existing legal authorities applied decisively.

This signals a narrower but more consequential shift: when sanctions violations, AIS manipulation, and false flagging converge, enforcement may no longer stop at designation alone. Physical intervention has become a viable outcome under specific, documentable conditions.

What Governments Should Expect Next

As enforcement accelerates, pressure will shift upstream.

Interdictions will increasingly rely on early detection rather than last-minute response. Authorities will need to identify which vessels are moving toward seizure-grade risk before they enter contested waters or complete cargo transfers. That requires more than static sanctions lists or AIS tracks viewed in isolation.

Dark fleet operations are networked. Vessels share ownership structures, registries, operational patterns, and deceptive behaviors across regions. AIS manipulation rarely occurs alone. It coincides with false documentation, implausible routing histories, and coordinated loitering patterns that only become visible when viewed as part of a wider system.

Governments that surface these connections early will be positioned to act decisively. Others will remain reactive.

 

Photo credit: Shaah Shahidh on Unsplash and Windward
Source: Windward
Published: 18 December, 2025

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Emissions reporting

StormGeo and OceanScore link emissions data, compliance workflows

Cooperation combines StormGeo’s expertise in operational vessel and emissions data with OceanScore’s expertise in emissions compliance workflows across EU ETS, FuelEU Maritime and UK ETS requirements.

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StormGeo and OceanScore link emissions data, compliance workflows

Weather intelligence and decision support solutions provider StormGeo and Hamburg-based technology platform OceanScore on Wednesday (3 June) said they have deepened their ongoing cooperation through the signing of a collaboration agreement during Posidonia 2026 in Athens on 2 June.

The cooperation combines StormGeo’s expertise in operational vessel and emissions data with OceanScore’s expertise in emissions compliance workflows across EU ETS, FuelEU Maritime and upcoming UK ETS requirements.

Together, the companies aim to help shipping companies seamlessly navigate increasing regulatory complexity more efficiently — from emissions reporting and data validation to compliance exposure management, pooling and financial settlement.

As emissions regulation becomes an increasingly important part of commercial shipping operations, the need for reliable operational data and streamlined compliance processes continues to grow. The cooperation between StormGeo and OceanScore is designed to support shipping companies with more connected, transparent and actionable processes across operational and commercial teams.

“From the outside, companies like StormGeo and OceanScore may sometimes be perceived as competitors because both operate around emissions and compliance workflows,” said Albrecht Grell, Managing Director at OceanScore. 

“But in reality, the industry increasingly needs both perspectives working together: trusted operational emissions data on one side and commercial compliance execution on the other. Our cooperation reflects that shipping companies are no longer looking for isolated solutions — they need connected processes, automated across different systems and reliable decision-making throughout the full compliance chain.”

By connecting validated operational emissions data with commercial compliance management, the cooperation supports workflows across:

  • emissions reporting and validation 
  • compliance management across EU ETS, FuelEU Maritime and upcoming UK ETS requirements
  • exposure visibility and cost transparency
  • pooling, settlement and financial processes 

The cooperation also aims to improve commercial transparency and coordination across operational and commercial stakeholders.

“StormGeo plays a central role in helping shipping companies turn operational vessel and emissions data into trusted, decision-ready insights,” said Espen Martinsen, Chief Commercial Officer at StormGeo. 

“As emissions regulations become more complex, this data is essential for transparent and efficient compliance management. By working with OceanScore, we can help customers connect StormGeo’s validated operational data with commercial compliance processes, creating a more integrated and practical approach to emissions management.”

The signing ceremony took place at the StormGeo booth during Posidonia 2026 in Athens and was attended by representatives from both companies.

Both companies expect the cooperation to continue evolving alongside upcoming regulatory developments, including FuelEU Maritime, EU ETS, the upcoming UK ETS and future emissions-related frameworks affecting global shipping.

 

Photo credit: StormGeo
Published: 4 June, 2026

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Technology

StormGeo integrates Alfa Laval sensor data with Voyage Intelligence platform

Enhancing voyage efficiency is seen as the primary use case for sensor data in the short term, with the initial focus mainly on marine fuel consumption, according to StormGeo’s VP Shipping Petter Andersen.

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StormGeo launches new premium advisory offering with emission compliance reporting

Weather intelligence and decision support solutions provider StormGeo on Monday (1 June) said the company is expanding its Voyage Intelligence platform by integrating sensor data from shipboard energy consumers to deliver real-time insights for enhanced technical performance under a partnership with its parent Alfa Laval.

The joint project marked a significant advance in digitalisation of shipboard equipment through automated collection of engine and hull data and integration into a wider digital ecosystem to give a clearer overview and better understanding of vessel performance.

StormGeo and Alfa Laval are combining their resources to provide hardware installation, data collection and analysis, performance advice and client support as part of a unique, all-inclusive delivery from a single company.  

StormGeo’s VP Shipping Petter Andersen, said: “The goal is to provide a comprehensive, integrated solution for shipping companies to simplify data collection and harvest more value by using actionable insights from sensor data to enable faster and better-informed voyage decision-making.”

Enhanced data-driven insight into vessel performance represents an enabler for operational efficiencies and fuel savings to boost sustainability through more effective decisions, with AI-driven analytics seen as a tool to support rather than replace human judgment to maintain the focus on safety as top priority.

“Ship operators need actionable insights, not just data. Continuous real-time monitoring helps transform sensor and performance data into smarter operational decisions,” Andersen said.

Alfa Laval, a supplier of ship equipment and specialist in real-time monitoring, is taking advantage of recent advances in onboard connectivity to apply its expertise in sensor data collection to shipping through the tie-up with StormGeo, a global provider of weather intelligence and smart digital solutions for voyage optimization.

Enhancing voyage efficiency is seen as the primary use case for sensor data in the short term, with the initial focus mainly on fuel consumption, according to Andersen.

Real-time data increases visibility of hull and main/auxiliary engine performance to inform proactive efficiency measures such as hull cleaning or engine tuning, while also providing a basis for long-term analysis and benchmarking at both individual ship and fleet level.

“The innovative element of this integration is that we are assimilating equipment sensor data with an array of datasets covering weather, route optimization, voyage planning and navigation, emissions reporting, and bunker planning and procurement accessible via a unified user interface. This gives a more holistic overview for operational decisions,” according to Andersen.

StormGeo is the sole contracting party for the integrated solution, while accessing resources and technology from Alfa Laval’s global network. The company now sees the opportunity for future application of sensor data to a wide range of operational, safety, commercial and environmental use cases in maritime, in partnership with third-party data providers.

In particular, Andersen highlighted the potential for automation of noon reporting based on streaming of fuel consumption data to replace time-consuming manual processes – such as email and fax – for meeting SOLAS and other reporting requirements. A further possible application is condition-based monitoring of equipment for proactive maintenance.

This is part of Alfa Laval’s broader strategy to expand sensor data collection across multiple ship systems to realize an Internet of Things (IoT) onboard as part of its cloud-based ALIoT platform, in line with the trend towards increased connectivity in shipping and smarter vessel operations.

Alfa Laval’s Head of Vessel Operations, Jesper Boman, said: “There’s a lot of potential to further digitalize, giving operators real-time insights that help them make better decisions, reduce risk, improve reliability, and avoid unnecessary costs.

“At the same time, implementing and using digital tools needs to be done with robust cybersecurity measures in place. Aligned with the international standards, to keep our maritime assets safe.”

 

Photo credit: StormGeo
Published: 2 June, 2026

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Bunker Fuel

StormGeo: Smarter voyage decisions can boost payback amid market swings

‘In an environment of fuel price fluctuations, freight market swings, operational disruption and rising emissions costs, voyage planning can no longer remain static,’ says StormGeo’s Rolf Reksten.

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StormGeo: Voyage optimisation falls short without real-time commercial clarity

Higher bunker prices. Trade route disruption. Soaring freight rates. 

The impact of the Middle East war on global shipping has again demonstrated how geopolitical shocks can drastically affect operational planning – and why navigating market volatility is essential to optimize the commercial efficiency of voyages, according to StormGeo on Thursday (28 May). 

“Operators have to expect the unexpected and be agile in their thinking,” said StormGeo’s Commercial Lead Routing Rolf Reksten.

“In an environment of fuel price fluctuations, freight market swings, operational disruption and rising emissions costs, voyage planning can no longer remain static.

“Operational decisions – from routing and speed to arrival timing – must increasingly respond to constantly changing economic conditions, in the same way that shipping must adapt to more extreme weather patterns caused by climate change,” he explained.

Accelerating cyclicality

Shipping markets have always experienced cycles, but these are becoming more frequent and volatile, driven by geopolitical effects, macroeconomic factors, energy market shifts, supply and demand, evolving regulation and critical stockpiles in key countries.

Optimization is no longer solely determined by speed and fuel efficiency, but by diverse factors that are reshaping voyage economics – and this makes operational decision-making more complex than ever.

“Rather than sailing smoothly from the Persian Gulf to India or China with crude, you may have to pick up the cargo from West Africa, Brazil or the US Gulf. Voyages are longer, the need for optimization is greater, and you have to relate execution much more to market volatility than before,” Reksten said.

The commercial outcome of a voyage is affected by the interplay of different economic variables – from fuel price volatility, rapidly moving freight markets and regulatory shifts that impact carbon costs to delays and trade disruption caused by port congestion, weather or regional conflict that can result in both direct costs and missed opportunities.

Fuel price effect

Given fuel is the largest cost variable of a voyage, bunker price hikes can significantly affect profitability without consideration of the wider commercial picture, and this requires a dynamic approach to decision-making to capture value across the voyage cycle.

Operators may lose value or increase risk if decisions are made without updated economic insight based on changing market conditions.

A case in point is the recent Strait of Hormuz crisis that fuelled higher tanker rates and a spike in bunker prices, which is estimated by lobby group Transport & Environment to have cost shipping companies an additional €340 million a day in fossil fuel bills.

Among the challenges for shipping companies are planning voyages without considering fuel price shifts, making speed decisions that do not account for port congestion or schedule changes, and having limited visibility into emissions cost exposure.

And this demands constant economic awareness with real-time data insights of the different variables to facilitate a shift from static to adaptive voyage planning to avoid leaving value on the table, according to Reksten.

‘Keeping an eye on markets’

“If you don’t have an eye on the markets and you’re purely focused on the route, this can undermine the commercial outcome of the voyage. You may need to reassess during the voyage whether to adjust speed, ETA or bunker strategy to execute in the most optimal way in relation to your commercial goals,” he said.

The need for a more dynamic approach to voyage planning is driving industry adoption of AI-driven voyage intelligence – integrating real-time data for ocean and weather conditions, vessel performance, market insights and emissions monitoring – to deliver predictive analytics supported by human expertise to inform adaptive decision-making, according to Reksten.

This enables operators to evaluate multiple scenarios and adapt according to changing conditions to safeguard voyage margins even in volatile markets, such as by capturing opportunities in a rising freight market.

“How you execute the current voyage can be tied to what your next employment will be. If the market is rising steeply, you want to sail as quickly as possible to discharge and offer your ship into the market at a higher price point,” Reksten explained.

Single source of truth

By combining operational, economic and sustainability data, voyage intelligence fully integrates commercial awareness into the planning process. Furthermore, it provides a single source of truth with visibility across company departments to allow better coordination between different teams, avoiding possible blind spots in decision-making.

“A typical voyage entails interaction between a lot of different moving parts – and this requires alignment of KPIs across commercial and operations teams that can be difficult in a fast-paced environment,” Reksten said.

Voyage intelligence allows decision-making to be informed by both operational expertise and evolving economic realities – such as metocean conditions, fuel prices, charter party requirements, freight market conditions, emissions and compliance obligations – to enable adaptive voyage management aligned with a shifting environment.

Managing uncertainty

This means shipping companies can manage uncertainty more effectively to provide better costs control in fluctuating fuel markets, freight market visibility, reduced risk of delays, improved schedule reliability, lower emissions and compliance risk – and stronger commercial margins.

“Profitability is the ultimate driver of decisions in shipping – and this is strongly impacted by market volatility. But companies able to quickly respond to changing conditions can turn volatility into competitive advantage,” Reksten concluded.

 

Photo credit: StormGeo
Published: 29 May, 2026

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