Russian Tankers Divert West After British Boardings
A sanctioned oil tanker with a history of safety violations passed through Ireland’s Exclusive Economic Zone last month, highlighting a sharp rise in Russian shadow fleet traffic off the country’s west coast, The Irish Times reported. The vessel, named the Myra, departed from Russia a week earlier and is linked to a shipping company owned by the son of a senior figure in the Iranian regime. While it claimed a flag-registration in Cameroon, International Maritime Organisation records show this registration is false, making it part of a global network of vessels used to evade international sanctions.
Data provided by Starboard Maritime Intelligence shows that 218 shadow fleet vessels have crossed the Irish EEZ since the start of the year. Of those ships, 208 face EU sanctions, while others are under restrictions imposed by the US, UK, or New Zealand. This represents a 193 per cent increase in shadow fleet activity compared to the same period in 2025, according to the Defence Forces. A Defence Forces spokesman attributed the surge to a shift in shipping routes after UK prime minister Keir Starmer announced that British forces would begin boarding shadow fleet vessels crossing the English Channel.
British Channel Interceptions Force Atlantic Route
The operational shift became concrete in June when Royal Marine Commandos boarded the sanctioned tanker Smyrtos in the English Channel. That intervention prompted vessel operators to alter their routes to avoid active enforcement. Gonzalo Saiz Erausquin, a sanctions expert with the Royal United Services Institute in the UK, noted that tankers with false flags began diverting north of Scotland and across the west of Ireland.
While the Myra was empty during its recent transit, approximately half of the Russian tankers taking the same route carry crude oil. Officials warn that the combination of ageing hulls and heavy cargo loads through the stormy waters of the north Atlantic exposes the Irish coast to severe environmental hazards. Worldwide, more than 50 collisions and oil spills have involved shadow fleet vessels in recent years, including an incident where a sanctioned tanker carrying 40 million gallons of Russian oil ran aground off Oman.
Aging Hulls and Safety Deficiencies Threaten Irish Waters
An Irish Times analysis of inspection reports for the 218 vessels traveling through Irish-controlled waters this year revealed that 72 per cent of the ships—totaling 156 vessels—had safety issues recorded during their last inspection. Inspectors documented 676 individual deficiencies across the fleet, and 23 per cent of the ships had been detained at some point in the past. Problems included fire safety hazards on 71 vessels, structural defects on 22 ships, and pollution-control failings on 28 others.
The average age of the sanctioned vessels traveling off Ireland stands at 20 years, compared to an industry average of 14 years for crude oil tankers. The Zambra, which entered the Irish EEZ in June, is 27 years old and has previously faced detention by Chinese authorities over pollution-prevention and fire-safety issues. Meanwhile, other tankers such as the White Condor 1 have avoided port authority inspections since 2018, and the US-sanctioned tanker Molly has never been inspected.
Naval Capacity Limits Enforcement Against Sanctioned Fleets
Minister for Defence Helen McEntee announced new powers earlier this year that would allow Irish naval personnel to seize shadow fleet vessels by force if necessary. However, ongoing crew shortages mean the Irish Naval Service can typically deploy only one or two ships to sea at a time, leaving monitoring of the 450,000sq km EEZ heavily reliant on aerial surveillance. Fianna Fáil MEP Barry Andrews stated that the navy must be fully equipped and empowered to tackle these vessels to protect the Irish coastline.
In response to the rising risks, the Coast Guard is drafting a new maritime oil spill contingency plan. The Irish Coast Guard currently monitors traffic using satellite data and fixed-wing aircraft, while Defence Forces aircraft are equipped with sensors capable of detecting marine discharges and passing data to the Coast Guard for assessment.
Frequently Asked Questions About Shadow Fleet Tankers
Why are these vessels referred to as a shadow fleet?
Shadow fleet vessels operate outside normal regulatory oversight and international sanctions regimes. They often use false flag-registrations, unverified insurance coverage, and opaque ownership structures to transport oil from sanctioned nations like Russia and Iran.
What specific hazards do these tankers pose to Ireland?
Senior military and security officials warn that ageing single-skinned tankers carrying millions of gallons of crude oil could cause catastrophic environmental damage if they suffer a structural failure or grounding along the west coast, where national emergency response capacity is limited.
How do authorities monitor these ships without boarding them?
The Irish Coast Guard conducts anti-pollution monitoring using satellite data and fixed-wing aircraft, while Defence Forces aircraft use advanced sensors to scan for discharges and relay potential environmental threats for official assessment.
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